Trouble conceiving

My husband and I have been trying to get pregnant for about four years now, I found out when I was 16 that I have polycystic ovaries (I was on my period for 7 weeks stright and to this day my period is still messed up), two years ago when 26 I found out I have immature eggs. We have been to an OBGYN, fertility doctor (once) our insurance doesn't help with infertility, if we pay outta packet it's $300 a visit. I was taking metformin  for about  almost two years  and it never worked, someone told me about a doctor she goes too, so I started going to her a year ago, I was 253 pounds last year around this time she put me on Phentermine (a diet pill) now I am 195 and still losing, she also put me back on Metformin and I've been taking both for a year now, I have had a period two months in a row but haven't had one since November. I know a lot of women that just recently got pregnant, I'm happy for them but at the same time I am jealous and lately it's been really getting to I don't know what to do, it hurts mostly when they complain about being pregnant. Does anyone else feel this way?