Metformin/short period/is this a sign?

❤TTC #1🤰🏾❤

I've been taking metformin to help balance my hormones to help me conceive. AF started on Friday and today is Monday & it's so light that I could just wear a panty liner, as before AF always lasted 7days... I have known a heightened smell with almost anything & my boobs feel like I'm carrying sand bags. Lol. I don't plan on testing until March 15. But I'd love to hear what you all think?

****Update****

Its still on... Bright red and dark tiny clots...