Wow! You are going through so much right now. I want to say how impressed I am that you are getting your college degree in spite of all the challenges you face right now. Good for you! You are traveling down a difficult road right now. Don't give up. You can do it.
As far as your biopsy is concerned, I would call your doctor and ask for the results. It should not take longer than a week to get results. 4 to 6 weeks is way too long, especially with your pregnancy. Finding our the results will at least help to get this off your plate.
Do you have a social worker at your State that can intercede and help you? I know that my mother-in-law has one that has worked miracles for them.
How about going to your church? Sometimes social agencies and churches will offer short term loans or be able to help.
Take each day one day at a time and if one day is too much, take it hour by hour or even minute by minute. You are working toward a better future and it will come.