I am pregnant and don't have insurance, I got pregnant in between I was switching my health insurance, now my current insurance is not covering it as it was a pre-existing condition, what do I do?

Most states have a state insurance for pregnant women. Ask your obstetrician

Umm, you should have a COBRA plan for the old insurance. Is it too late to get back on your old insurance through the cobra plan? If not go to your local health dept. and seek advice there. And do not forget the WIC program.

Sadly depending on your income there is not state insurance available.
For example here if you make more than about 7 dollars a hour there is no state insurance available. But most doctors will allow you to work out a payment plan. And most county health departments offer pre natal care also.