Pregnant or not

Karen

So I’m January I used plan b but the condom got stuck and my period came feb-March and in March my partner and I went on a vacation but we used condoms the whole time we were there and I was ovulating the 20-27 and in the 25 we had sex without a condom but later he put a condom on bc we didn’t want to risk it and we had sex I’m the jacuzzi as well now April has come and my period was suppose to come on April 9 and it hasn’t and I’ve taken multiple pregnancy tests and all negative I’m not sure if my period is going back to the cycle it was once before plan b in Jan or what is going on. I neeed help