Even though your sex was close to the fertile window there is no suggestion you may be pregnant. Why not run a test this weekend just to confirm.
Posting an update just because even if time passes a lot someone that goes through this could find answers and comfort. As a person with anxiety disorders it's very hard to take sth out of your mind and see clear especially when this regards health issues. So I will be completely objective here. I went to the obgyn 2 weeks after the early period I had and 1 week after the day I should have normally gotten my period. She did a transvaginal ultrasound and told me I'm not pregnant and it's a cyst. I let one month pass and didn't get my period with the early date. Now I am 6 days late took a pregnancy test and it was negative. I could see a very very faint line after looking very very closely in the darker side of the room. A line that if you try to focus on it I sometimes see it sometimes no. In the day light it's negative. I took pictures and you can't see it unless you lower the vibrance. My mom says it's 10000% negative but I can't stop thinking bad about it. I will do one more. Please If you deal with a person who has lots of anxiety just know that it's very hard for them to see clear and be free of their worries beat with them don't get mad. I know I had protected intercourse, a period (bc it lasted 5 days and I had a lot of blood for it to be typical implantation) and an obgyn telling me I'm not pregnant and a most likely negative test but I can't get the bad thought out of my mind. I will update again
You had protected the sex. The likelihood you'd have had any reason to get pregnant from that is highly unlikely. Condoms work unless they break and IF they break, you notice.
Now, tests. They need to be used exactly like the instructions said and ONLY read in the time frame. They develop an evaporation line if left to sit any longer. Go with your mom here, it sounds negative.
Do you suffer anxiety on a regular basis?