If you already have BCBS and are switching I would just try to make sure there isn't a lapse in coverage. I don't imagine it would be a problem I'm sorry that it's causing extra stress Can you call the insurance company to verify?
I think you are fine. We picked up a BCBS individual policy and there was a 6 month wait on coverage for pregnancy. From what I understood at the time, pregnancy would be covered if it was a group policy.