pcos hcg levels

okay so I was reading that pcos might cause "false negatives" that hcg levels are generally lower if you have pcos because of hormonal imbalances. so I'm 2 days late, bfns. tested day and night but there's no signs of af, I usually cramp really bad and want to eat everything in sight, and have the worst mood swings, few days before and I haven't this cycle. but just want to know if anyone else had to wait a few more days to get bfp with pcos.