Oh Shannan, I am so sorry for all your losses and that you've had such a hard journey so far. I don't have PCOS but one of my best friends has, and she has piled on stacks of weight when she was finally diagnosed a few years ago ( she is only 29 ). She went to a very well known IVF specialist ( she's got to do IVF as she has only one ovary and it's blocked so she's not ovulating on her own ), and he told her flat out, lose the weight or you'll never get pregnant. She was furious. She used to bleed 3 out of every 4 weeks of the month, very heavy.
She did a program at the Royal Women's Hospital here in Melbourne last year, and took meds to get her glucose levels under control. They are now good, but then becuase her lining has always been on the thick side, she's had an implant put in her uterus, and now the lining is a normal thickness and the implant is coming out. She's hoping to do an IVF cycle mid month. I don't know if I helped you at all, but I wish you much success in achieving your dream soon.
Good luck hun.