I had my period on 17th April and then 18th May. However on June, my period started only on the 24th. I had unprotected sex with my boyfriend on the 16th and 17th of July. My period has not come out yet. Am I pregnant? I'm really worried.

Today is the 44th day since I last had my period. I am really worried if I am pregnant. I had 5 home pregnancy test with early morning urine which all turned out to be negative. Could I be pregnant?