Does metformin for Diabetes type2 affect period?

Holly

My dr upped my dose from 500mg twice daily to 1000mg twice daily about a month ago. Could that affect my period? It's a little early if it is my period but I wiped bright red yesterday covered the whole amount of toilet paper but didn't saturate it and now it's pink. Just wondering if my metformin messed with my hormones or if this is implantation