Oh, be prepared this is long....
I'd have to agree that : A "clean house" is a relative term. It all depends on your idea of what clean is, and what your expectations are. I also feel there is a big difference in how someones house appears if you just drop by vs if you've been invited to come over.
I have 3 kids and 1 on the way (6, 4, 2, and baby due in next month) I also have a husband (who makes a mess) and 3 cats... If someone were to just drop by my house at any given point during the day they're most likely going to see toys on the floor, crumbs under my kitchen table, arts and crafts all over the dining room table, some dishes in the sink or on the stove, hair on the bathroom floor, and finger prints on things. They're probably going to smell the cat box and see some cat hair around the house...lol... And that's just the downstairs not including the mess that the kids make upstairs in their rooms. That's just part of being home and living life.
I do sweep every day and do dishes multiple times a day. I mop more than once a week, and dust about every week. I wipe down the appliances a couple times a week, but soon after there's a new mess and little finger prints on things again. I also do 10+ loads of laundry a week and not every load gets put away as soon as they are out of the dryer. So there is usually at least one laundry basket either on my floor or bed to be either washed/folded/ or put away. I try to swish out the toilet a few times a week, and wipe it down. But we only have one bathroom and unless I'm doing it multiple times a day it's not always going to look completely clean. I clean the cat box a couple times a week, but some days it just smells more than others. The kids pick up their toys in their rooms before bed, but I don't dust or sweep up there as much as I should. There are some things that are just impossible to keep up with to have an immaculate home all the time. Unless of course you aren't home all day to make any messes. So if someone just dropped by I may feel a little self conscious about how the house looks depending on the time of day and how the day has been going. But I know that my house is clean. There are some days that I might get nothing done at all because I don't feel good, or I have a sick kid, or I'm just being lazy and the house will look like a total disaster. Mind you I'm not nursing a little one yet. My 3 are a little more self sufficient so I can get more things done. I'm sure once the new one comes some of the cleaning will get pushed aside and my house will be a little messier.
I grew up in a very neat and clean household (it was only my mother and myself). When I was a kid the first thing my mother would ask when I came home from a new friends house was how clean the house was....LOL So I know that I naturally have very high expectations of how I feel peoples houses should look just because of the way I was brought up. So if I invite someone over I feel that is a totally different situation! I will make sure the floors are swept/mopped, counters and all tables are wiped clean and clutter is put away, the dishes are clean and put away (or at least hiding in the dishwasher), bathroom is clean, appliances are wiped down, and windows are finger print free, and lastly toys are picked up. If I'm inviting someone into my house I want them to feel comfortable and not looking around at a mess.
I have been invited over other peoples houses and the house is a total disaster! Situations where you don't know where to put your coat or bag down because you're afraid it's going to get stained or stick to something, or your shoes stick to the floor because there's spills that never got cleaned up and are now dried and sticky. I've been invited to playdates for the older kids at peoples houses where it's obvious that the mess on the table is from dinner the night before and breakfast and it was never wiped up and now everyone is sitting around the table and you can't put your arms down because of the crumbs. And it's clearly obvious that some things just never get cleaned. There's been times that it's even to the point that I'm afraid to use the bathroom because there is just grime on everything. I feel it's a little disappointing and am a little shocked because these have been situations where I've been invited over not just stopped by. If I just stopped by someones house unexpected (which I hardly ever do) I would never have any assumptions on how clean the house should be especially if they have small children. I would also never judge someone if there was a mess when I'm the one who's stopping by unannounced.
I wouldn't worry about it. You've got a lot going on still nursing a little one which takes a lot of time and energy!