maternal fetal medicine specialist or perinatologist for high risk preg

Shomaila
Hey all. It's my first baby and am 36 and slightly obese. Do I need to go see a perinatologist. I have started seeing one ob & perinatologist but am not happy with her and there are no other in my area under my insurance. Would it be ok if I just go to regular obGyn and get checked by perinatologist if needed  Do we need a perinatologist or maternal fetal specialist at time of delivery? Cause there are few specialist who aren't Ob and thus won't be there for delivery. very confused. Please help.