I had to stop metformin due to upset tum.
I restarted it and boy I was flooded by hormones. Crying a lot and a mini period then nothing til my normal end of month period and it was less painful that a one 2 myths ago when on full metformin 2000mgs.
Yes metformin causes emotional hormones like a proper woman than a testosterone filled one from pcos. I even first thought it was the change but nope, all good again on 2000mgs metformin. Period came on time following month.
Oh so much crying on metformin disruption but tummy couldn't take it's extra pressure, nor my liver.
Excellent advice on stopping metformin in tummy bug times thou. Electrolytes reduced dramatically if sickness and diarrhea bout. I drink plenty of water then return to metformin once no longer being sick or loose.
Once every few months for me with very young kids passing on germs.