I'm getting discouraged and feeling down. Anyone have any advice?

I have PCOS and after months of meds and doctor visits we are able to get pregnant in August (with timed intercourse). However the pregnancy wasn't viable and I had a D&C on September 21st. Since then af hasn't shown up. My cycle is usually out of wack (sometimes missing for 3+months). I'm on Provera now to sort of kick start my period. Sometimes I feel like I'm wasting time on something that will never happen. Anyone have any success stories or advice I'd appreciate it.

good luck to everyone ttc.