If I use a condom during my fertile days, can my partner be pregnant?

Hello. I have a very serious question that bothers me very much. Well, a few days ago, i.e. Friday and Saturday, I had sex with my partner. The problem is that she had fertile days. On Friday she ovulated, but then we only had intercourse for a while because I had a problem with an erection in a condom (stress) Saturday was her last fertile day, as far as I remember from her diary, and then we had sex much longer. I'm afraid there's a risk of pregnancy, but I'm aware that I'm also winding myself up. Well. Even though it was the last fertile day based on the results from the calendar, I'm still scared. Of course, sex by no means ended with ejaculation in the vagina. I also had a condom on. The only problem with it was that it often slipped. I'd correct it, and if it still caused problems, I'd put on another one. As I wrote, there was no ejaculation in her even once. After intercourse, we checked to see if any condoms had broken or not and luckily none were broken. While sliding it off, I would like to add that it never slid below the head, only the sliding occurred to the middle of the penis +-. As I wrote, I also changed. All the friends I asked said it wouldn't happen, but they were just friends. On the side, I would also say that the chances of pregnancy are small, because it is not so easy for people to fertilize, after all, people try so hard, but it concerns me and my partner, so the fears are growing. She doesn't want to stress her out because she may still be delayed by her period.

Accordingly. My question is as follows. Is there a chance, and if so, is it high, of getting pregnant? I'm terrified, and my partner is supposed to have her period around the middle of the month, and I can't function because I keep thinking about it. Her hunch and mine tell me she won't be pregnant, but that's just a hunch and facts are facts. I'm begging for help because it's hard with me. I also greet you cordially