Does smoking weed on birthcontrol promote blood clots like cigarettes do?

i smoke weed like a few or couple times a week..but i dont smoke, because i know that smoking cigs while on birthcontrol will heighten your chances of getting blood clots or make your birthcontrol less effective. but someone told me yesterday that smoking weed will do the same thing because your letting toxins into your body, even though its not nicotine and tobacco and stuff. so now im confused because ive read the opposite before. im taking yaz birthcontrol