Please help me pay my medical bills...

Hi, everybody. It's so embarrassing to be doing this, but I need help. Recent medical bills have put me in the hole. Due to the results of a recent physical plus bloodwork, my doctor wants to screen me for cancer, and I cannot afford the tests, even with my insurance. $500 is all I need for the screening, so that's what I'm setting as my goal, but anything beyond that would also help get me out of the red, and would be extremely appreciated. I wish I could say I'd pay you all back, but if I'm being completely honest, I probably won't be able to. I understand times are tough for everyone, but if you could possibly help me out, I would be eternally grateful.