TMI need advice please.

Gemma

I have PCOS and started on metformin and have gradually gone up to 2 a day (1000mg) my period was 1 day late and started at a normal flow. Next day I was really heavy and the following day it was brown and hardly anything at all. Normally my flow is 6-7 days long. I have had really bad sickness, diarrhoea, backache,mood swings and headaches galore. Has anyone else ever experienced this on metformin?

Just need friendly advice please!