I have PCOS but my periods have been regular since I use Yasmin. I had my vsg done over a week ago and got my period 3 days post-op. I started Yasmin again but noticed my period is heavier and where usually it lasts 3-5 days, it’s almost been a week now. Is that normal?

yes. Lots of women report mood swings and screwed-up menstrual cycles the first few weeks (or months) after surgery. It eventually settles down and stabilizes. It's supposedly due to excess estrogen being released. Estrogen is stored in fat cells, and it's released during rapid weight loss. As I said, it'll eventually stabilize and go back to normal - but it takes a few weeks (or months)

Mine was sort of heavier too and I had breakthrough bleeding for a while. It normalized now I am almost 4 months out.

I also struggle with PCOS and never had periods without Provera before surgery. I got my period 3 days post op until day 7 and I spot basically every other day now (I'm 2 weeks postop today) and was told that it was normal so my suggestion is just wear liners every day just in case ):