I really don't know

Okay so I'm with my boyfriend alot but I've never thought this could happen since I had surgery.

So I was supposed to get my cycle on the 25 of this month, but it hasn't came at all. I had surgery a year ago on my ovary because I had an ovarian cyst, which caused me to have irregular periods, on my left ovary so they ended up removing my left ovary and fallopian tube. So a month after surgery I started having a cycle ever month and it would start 16-19, but these past few months they started coming later in the month. Me and my boyfriend have had sex a couple of times more than I can count, but this month since I try to track my cycle it said it was supposed to come the 25 but it never came. It also stated that I was ovulating during the time him and I had unprotected sex, but he has never cum inside me before. So I'm getting a little nerves.

Should I take a pregnancy test or do you guys think I'm over exaggerating?