You could do a lot of lab assisting, offer to TA for a college or lead a lab section, or you could apply for general work like secretarial or something like that to keep your bills paid.
And, if you were really in a bind, you could always wait tables. I paid my bills waiting tables during second and third shifts and even though it certainly wasn't my favorite job, I certainly made my money and some friends that way. I also cleaned dorm buildings for a while just to get food on the table before that.
An alternate plan if you want to stay in healthcare is to get a certificate in something- maybe as a CNA or EMT or something like that. After a few years of that, you could certainly try for PA school if the MD/DO doesn't speak to you any more.