advice please! I'm desperate.

So I've been ttc for almost 2 years now. Every time I try to take vitamins my cycle goes haywire with constant bleeding. Went to the doctor and she put me on some vitamins, maca root, and metformin. Well the day after I started taking everything I started to bleed lightly. It stayed light until it was my normal period time (a full month) and it got so heavy... I bled through my bedsheets two nights and I wasn't asleep very long. Well usually my period lasts 5 days it's now been very heavy for 10 with no sign of stopping. I emailed my doctor and am waiting for a response but have any of you experienced anything like this? Any ideas about how to get it to stop naturally.. I really don't want to have to go back on bc to get this under control... I tried to drink cinnamon tea and it didn't help.