What should I do?

I've been bleeding for 6 months. Constantly bleeding. Granted, I do get 1-2 days every 3-4 weeks without any bleeding, which I am so grateful for! But all this blood is starting to worry me. I'm constantly tired and thirsty. I eat everything in the house. I have no idea what's going on in there but I wish it would stop! I don't have health insurance so I'm too scared to go to the doctor. What should I do?