Vaccinated and got Covid

I’m not sure if I have Covid or not. Just found out someone close to me might. I only got my first dose, ever since I got it I’ve been feeling kind of eh. It’s been 7 days since I got the first dose. The person close to me has been feeling very sick for about 3 days and I’ve been with them everyday. They took an at home Covid test, but it’s not a very popular one and when I checked online, it has really bad reviews for false positives. I thought that they were just having a cold since they don’t go anywhere and don’t go out with anyone really, just 1 friend but the friend doesn’t have Covid. Anyway, the at home test turned out positive, both the tests in the kit were positive.

I’m just kind of scared. I think this might also be a false positive, but can never be too careful.

If you had Covid after being vaccinated (whether first or second dose) what were your symptoms? Or did you not have any?