Can I get more child support once my divorce is final?

Spouse and I are separated and he’s been paying me child support for our three kids since he left. Right now, my kids and I are still on his health insurance policy. But we are moving toward a final divorce and once it’s done, I’ll be cut off from his policy and will need to get my own. Insurance through my work costs a lot and I’m not going to be able to pay for what my kids need and pay for my own insurance. Could a judge require my ex to continue to provide me health insurance after the divorce and if not, can I ask for more child support?