If you think you previously had it you might want to get an antibody test. I was really sick in early March, but there were no covid tests available then. I got an antibody test when available, but it was negative. It's definitely made me more vigilant knowing that I actually didn't get it.
Conversely, a friend that was only mildly sick around the same time got a positive antibody test. He recently travelled to see his elderly parents since he was pretty sure he couldn't spread it to them.