Secondary infertility? It what can i do?

Hello Dr, I am seeking guidance from you as I don't have any parents, recently lost them both. I will be 38 in 2 months, I have a 12 year old child, naturally conceived inspite of having pcos and delivered via c section because the Dr told me I couldn't have natural birth even though I didn't have bp or diabetes.. Over the years, I never conceived again, tried treatment once but it ended in ovarian hyper stimulation, I don't use any birth control other than condom but we have intercourse 4 or 5 times a month.. My weight was always on heavier side, was 100 when I first conceived, now I was heaviest at 121 but came down to 115.. I am trying to lose weight but along with it what can I do? I have visited fertility Dr's but they sent me away to lose weight and inspite of everything I lose till 100 kg, am trying to lose more.. one Dr asked me to start Finast but I thought it's not right because already my testosterone was borderline high, so I didn't go that path again.. Please guide me..