Take one??

I have been on Metformin for about 3 weeks now. I do have this bleeding and its very strange. It's never in the morning or night. I will go pee at about noon and 2-3 and that's the only time blood is there. Any wipe before or after that has no blood. I'm trying to get a hold of my doctor, but should I take a pregnancy test and see if there is anything there? It's not heavy bleeding at all.

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