Period

I need some advice. My cycle changed on the month of March i didn’t get my period. I get it every beginning of the month. I had sex with my boyfriend June 20 on my ovulation day with protection. We are in the month of July I should be on my period. But I am two days late. I took a pregnancy test and it came out negative but I still haven’t had my period. What is going on with my body. Am I pregnant or not. Will I get my period. I’m so confused. My mind is all over the place.