Need a Lil help or advice

I have a question was told last year I had pcos. Doc did a DNC IN Oct been taking metformin since then. Af been coming on regular but this month I haven't seen AF. Af should have came on the 10 but still nothing and today is the 19th. Took three hpt got negative. My question is any women here have pcos and had a negative results but went to doctor and got a positive thru blood or did Ultrasound and seen a baby? Jus not trying to get happy and it's nothing.. have doc appointment April 2.. Fingers crossed baby dust everyone