HELP WHAT WOULD THE CHANCES BE

So I had sex with my boyfriend for the first time and we didn’t use protection and he didn’t pull out (it was in the moment). Anyways I had sex knowing my period was due in 5 or 6 days so my fertility wasn’t high at all. But now my periods due in 2 days and I had the sex on Wednesday and I’m all so confused because I took Norethisterone in January to delay that period because I was on holiday and got it on the 30th of January. I don’t know if it delayed my ovulation too. What do I do, what would the chances be!!???