applying for medicare on unemployment?

hey all. just was wondering if anyone had any input on my situation. im currently unemployed(my employer fired me for a stupid reason after finding out im pregnant). Im collecting unemployment and i pay for my insurance through the marketplace. my premium is still based off of my employed income though. the marketplace just sent a letter out saying december 15th is the deadline for renewal, but the cost has gone up on my premium. also, everytime i get an ultrasound its $60 copay. If im hospitalised for my pregnancy its $400 copay a day!! thats for my current insurance and im not sure what it will be if i was to renew it. i cant afford it right now. so far i haven't been in the hospital but eventually I'll have to give birth😏and thats gonna be one hefty bill of copays😔its just not working out. i would like to try and get some medicaid but i do recieve unemployment. i haven't gotten to the welfare office just yet because i didn't think i would need to, but im starting to think differently. does anyone know how this works? also if i did wind up getting the medicaid would they cancel it if i got a job? im in school a few nights a week but i would like to get working again before im showing too much! im 20 weeks2days. any advice??