Health insurance question? Help?

Me
My husband recently got a promotion, awesome right? Not. With his promotion he is no longer considered union! Spousal surcharge went up to $70 a week on top of adding our newborn daughter as well. My daughter and I are on Medicaid also. My question is do I really have to be on my husbands insurance or can I just have medicaid and that's it? Help anyone gone through this? His promotion literally makes him bring home $100 less a week because all of the insurance fees.