Teresa - It really masked it for me.
You don't know your periods have stopped because you get withdrawal bleeds.
It was only when I stopped it that I realised my periods had stopped.
Initially after I stopped the pill I was enjoying not filling my body with chemicals.
I had flushes which were copeable, VA which needed local oestrogen.
Things weren't bad for 6 months after which my MS kicked off big style.
Oestrogen has a definite calming influence on MS (pregnant ladies don't get relapses)
A spectacular fall sent me scuttling to a GP with a brain, armed with articles describing the influence of oestrogen on MS. She gave me Evorel conti patches, for which I am so so grateful.