Healthcare??

With all the news about trump lately, I'm terrified that I'm going to lose coverage. I'm eighteen and I have a private insurance and Medicaid, because my moms insurance doesn't cover labor/delivery/anything like that. If I lost my insurance before my baby gets here (Feb) I won't be able to afford to give birth at a hospital, and I'm not sure what I'd do. If he does repeal/replace ACA how long will it take to take effect?