I had sex two days after my periods got over. The boy says he didn't ejaculate nor did I get any indication of an ejaculation. After a week I suffered from urinary tract infection which was cured soon. My periods are a week late.is it possible that I might be pregnant? Please advise.

If you had sex, you didn't say whether it was protected or not, you have a risk of pregnancy. At this point it would be best to take a HPT using first morning urine.

I had unprotected sex

Then pregnancy is a higher possibility. Time to take a pregnancy test/