Advice please

Okay ladies. This is my first cycle trying to conceive knowing I have pcos. I have been on mertformin since April. I am down 15 pounds. I also just went off of the nuvaring. My period ended 10/24. My husband and I baby danced every other day this month so far. I typically have 30 day cycles. Both of my <a href="">fertility apps</a> predicted I ovulated on 11/4. I have dark brown spotting yesterday and today. Now it is gone. I just tested and got a bfn. Period is due Monday. Should I just wait to test until Tuesday? I didn’t use a FRER. It was a cheapie.