I am in the same predicament! I have a pump (Medela Pump in Style...love it!) and I'm having trouble adding pumping to my routine.
I started pumping as often as possible (about an hour after my little one nursed) at 2 weeks old. It works okay if I remember to pump, but sometimes I forget. That's the hardest part for me..remembering to actually do it. I've found that if I put the pump out, close to the area of the house I'm often in, and have it ready to go, I'm more likely to actually do it!
I've given my 3 week old a bottle twice a week and he's been doing really well. I feel like 2 times a day is too often for me because I don't want my baby to grow too accustomed to the bottle and not want to nurse with me. That's just my opinion, I don't in any way want to make you feel guilty, that's just what I've been thinking about lately.
I hope you can find a rhythm and that you and your baby can get into a work routine that is good for you two! Good luck.