What can I as a part-time worker get for health insurance?

I have a kind of complicated predicament. I have recently changed jobs and earn $16 an hour. I am on Medicaid right now and I’m afraid that this wage change will mean I won’t have it anymore. I don’t know how many hours my employer will give me, but it’s not enough to be full-time. Only full-time workers receive health insurance in the company. I’m just afraid I won’t be able to afford healthcare because I’m only going to be part-time. My university doesn’t offer health insurance and my parents refuse to insure me even though I am under 26. Also, I live with my boyfriend so we’re not married. We have no children and don’t claim each other as dependents on our taxes. I have no idea if his income will be considered in this decision too though. I know open enrollment is around this time, so maybe I could get something affordable through the marketplace? I have no one who can get me insurance any other way. There are some health problems I currently have and I don’t want to go into medical debt just to feel better. Any advice on this would be much appreciated