Is it possible to get pregnant and not have a period?

Me and my partner sex last Sunday (19) Monday (20) and Wednesday (22). That Sunday was the first time since April. My periods have been regular since I was 16. I think I may of been ovulating on Sunday when we had intercourse, we did use a condom but Idk of there were any rips or anything. On Monday we had sex for about 5 hours, foreplay and such, but we did use the same condom for majority of the time. And on Wednesday we did foreplay before he put the condom on and I think some of the precum came on to me but I'm not sure what happened. But now my periods late, I was to have it Saturday (25) and here 5 days later and nothing. I did have some spotting on Thrusday and Friday but it went away. Is there a chance of pregnancy or could it be something else? I tried telling him but he only ignored me.