((((Hugs)))) Tracey.
It will probably be nice to be off in 8weeks, but I can see your concerns.
I would probably hang tight and just see how you are feeling closer to the time. I don't know how flexible your employer is, but if you for-warned them that 28 wks is the soonest, but that you would like to either lessen your hours or work week by week from that point - you may get an extra couple of weeks in dependant on how everythings going. It would be nice to have more time with baby at the other end
I hope it all fits into place for you sweet - just don't stress.
The other options is if you do need to go back to work, trying to get the baby into home care (bernados, Pause, etc) with somebody who responds to her well, and doesn't look after a whole lot of other kids, would probably be a good option, cause then you know they are getting the best one on one care, they can get.
Anyway, just a few suggestions