Can this be so?

Hey lady’s I have a question do you think sperm could push back a period? Lately I’ve been sleeping a lot and feeling like crap boobs are sore and all! Anyways I was suppose to get my period today and didn’t which is a good sign since we’ve been trying to get pregnant we had sex on my ovulation days so is there a chance I could be pregnant or is there another reason I could be late aka I’m thinking maybe the sperm is making me get my period late but I’m not sure if that’s possible