one step forward 5 steps backwards

I'm only 22 I've been with my partner for 6 years now and we've been trying for 2 years for a baby. I was diagnosed with pcos just after we started trying. I was told I needed to lose 10kgs before anything would be possible which I've done I've even lost about 20kgs and now Ive found out that  as of 2 months ago I'm not ovulating. Although I've had spotting 2 weeks after my period 2 months in a row my sister tells me that this is me ovulating as 2 weeks later I have a normal period. Has anyone else had this? Or have any advice? I could really use some ☹️ doctors are not very much help either