OKay so what are the chance if being pregnant?

OKay I have been in nuvaring for cinsistantly eight months not missing days I was on my period over the weekend and my bf and I had sex sun I was still lighty bleeding monday I put my birth control in we didnt use a condom I asked him I said you pulled out he was like yes but I might have gotten some in you .. What are the chance I cld get pregnant I went pee afterwards as well