Your level of commitment and understanding is extraordinary, sir.
Now, to address your concerns, I suspect that your gf's seeming loss of interest in your relationship could reflect a lack of self-esteem. As a PCOS woman, I can relate to being unsatisfied with my body image, and not feeling confident in my ability to attract a man and/or hold his interest.
Remind her daily of how beautiful and sexy she is to you.
Poor thing, she must feel helpless, with no health insurance and limited resources. I was in the same boat up until 6 months ago. Being without health insurance is what lead me to seek out "community acupuncture". It's low-cost and is becoming increasingly popular across the States! Works for me.