Late period + neg tests

Brooke • Tue, Oct 16

Hi! I am ttc (post miscarriage) I have pcos and I am on metformin. Since commencing metformin, (three months) my cycle has been regular. This month I am four days late, but every test I take (which may or not be twice a day) is negative. Is there a chance I am pregnant and I just haven’t produced enough hcg yet?