I've had 6 pregnancies now, and honestly each one is so so different. It is still very early, and while you may have some bad morning sickness (definitely sounds like it), there are some things that can potentially help that. Maybe talk to your dr about what he/she would suggest, but I have used ginger with great success. Sipping ginger-ale really does help me.
In one of my pregnancies I had hyperemesis gravidarium, morning sickness so bad I should have been hospitalized. I lost 15 lbs by the time I was 12 weeks, so I definitely understand the bad nausea and how it can REALLY REALLY wear you down, and make you not even want to be pregnant. Unfortunately, I lost that pregnancy just after the 12 week mark, which was completely and totally awful. It was definitely a wake up call that I was heartbroken about the pregnancy ending even though I didn't want to be pregnant while I was pregnant (scared about how to handle a 3rd baby with one child who was severely autistic and another one under 2, plus feeling like complete and total crap).
My last pregnancy I was scared to death too (same thing - child who is severely autistic + another little one + a new baby = scary). I miscarried that baby as well. Of course, I don't think it had anything to do with feeling bad about the pregnancy in the beginning - sometimes bad things just happen. It did remind me though, just like with the last time, that even with all the negative things I was feeling, and how overwhelming it was, I did still want that baby deep down, and I was sad when it ended.
If only pregnancy emotions were things we could easily figure out or help to be better, right?
All that to say, hang in there. Things may be different this time than last time. My first pregnancy with my oldest daughter was really difficult. I didn't have bad morning sickness with her, but I developed pre-ecclampsia, toxemia, an irregular heartbeat, horrible sciatic pain, and had strong contractions from weeks 32-40, that only bedrest could help (and really I should have been delivered earlier than I was, but cest la vie). I used to tell people I'd go through my 17 hour OMG-IT-HURTS labor over and over if it meant I could avoid the whole pregnancy part again.
Then, I got pregnant with my second child. My pregnancy with her was picture perfect all the way through. No bad morning sickness (a few queasy days but nothing terribly bad), didn't gain much weight, no complications, felt great the whole time, etc. It was a COMPLETELY different experience from my first pregnancy, but I had no way of knowing that!
Pregnancy is so unpredictable and has so many changes. Hang in there. This one could be a LOT easier than your last one. Keep the hope for that.
Maybe when its late and you're tired and queasy or questioning the wisdom of getting pregnant this time around, try to redirect your focus to all the reasons you wanted to be pregnant, and all the things you love about pregnancy, and babies. Maybe make a pin-board or a collage of things that will remind you of those positive things, and meditate on it when you're feeling down. You could put words on it like "feeling my baby kick for the first time" "baby hiccups and watching my tummy jump" "soft baby hair" "the way babies smell" - you could put images of tiny baby toes, and mothers hugging their newborns, or images of happy pregnant women with words next to them about the reasons you think they might be happy.
Hang in there and know that you're not alone. If you need to talk, we're here!