D.G.
I was able to choose when to go back to work after both my sons as I was changing jobs both times (I'm a physical therapist). Everyone one as different experiences but here is mine -
I was bored out of my mind for the first 2 months but when the baby starting engaging and moving I enjoyed being with him more. However by 6 months I was ready to start working (3days/wk). I found my babysitter on this site actually.
With my 2nd baby I stayed home for 5 months (+ one month before his birth). When I had started interviewing around month 3 Iwas not ready and turned down a couple offers. I also found different childcare - someone to come to our house as my new job was closer to home and I wanted to be able to see the kids if I wanted at lunch.
I like working part-time as it keeps me current in the event I would need to go back full time as well as keeping an indentity other than "mom" all while giving me the extra time to watch my boys grow up.
I'd recommend talking to a lot of people (as you're already doing), visiting daycare centers, and learning about resources in finding sitters. The ultimate decision will still be hard but you might feel a little more confident with some research under your belt.
Good luck with the pregnancy.