Hi there, you're probably just experiencing severe thrush if it keeps coming back as your hormones will be a bit confused as you've stopped taking the pill. Good thing is, thrush is really simple to get rid of. You can get a pessary at your local pharmacy - I don't think its an over the counter thing so no need to worry about being embarrassed when you get it. It's basically a tablet you put inside your vagina and works almost instantly and it always comes with cream to put on your vagina, which will cool it down and sooth. You should abstain from sex whilst using this as friction can be a massive irritant on the area. Clean your vagina with warm water twice a day and also wear 100% cotton underwear and you should be back to normal soon :).
I've tried that :( I don't think it's thrush because it's only on the outside skin, not on the inside and my discharge and such is normal as well.