Cigarettes & The Pill? 🚬💊

I've been on the pill for well over two years now. When I first started, I would smoke a cigarette a couple times a week but my boyfriend at the time wasn't okay with that. But now, my current boyfriend smokes and I started smoking again. I smoke way more than I used to and I guess you could say I'm addicted. I heard that you can get blood clots from smoking while on the pill, is that true? If so, how much should I cut down without having to completely quit?