faint lines Friday .. beta of 3!!????

So Here's my story .. 12 months of ttc with multiple chemical pregnancies.. had a tubal reversal Jan 2015.. this past cycle .. got 6 vvfl on Friday at 12dpo even fainter lines sat and sun .. almost non existent lines mon tues and today .. almost positive opk today .. betas from Monday were a low of 3 with progesterone of 2.2 had my levels drawn again today hoping for good results tomorrow . I just don't understand how the lines were darker at 12 dpo (only 1 day.. I'm a poas addict) have all the symptoms and a week 7 days late for AF