“Are Covid-19 Antigen Rapid Tests accurate? ”

I took two antigen rapid covid tests and they both came up positive. Two days ago, my head felt heavy and it hurt really bad, when I would stand or move I felt lightheaded. I tried to sleep it off but woke up with sore muscles. 2 days later, right now. Headache is gone. I sneeze every 5 minutes and I have a runny nose. My nose feels ticklish and if I sneeze too hard my arms get sore. I don't know if a test can make it positive for normal cold. Confused if I just have a normal cold or if I actually have covid. I took the test, it was positive twice but when my mom took hers twice, they were both negative.