Hi, I was diagnosed with PCOS about for five months ago. I have been taking Metformin one because I am trying and it helps keep your periods on track. They have been on track sense I have taken it. Now I’m 6 days late. Took a test and it’s negative? My question is should I go to the doctor what should I do? With my first it took 2 1/2 months to show up on a test.