I had it in March 2020 before anyone was testing in AZ outside of hospitals. I haven’t had the antibody test so I can’t prove it, but my symptoms were the quintessential low grade fever, annoying dry cough, extreme fatigue, headache & muscle aches. I haven’t been sick since then, even though I was maskless until July 2020. If I didn’t have it in March, then I also never got it afterwards, even though I was exposed to my daughter and her family the day before they came down with Covid.
Antibodies to any disease fade with time. What you want is memory of the virus in your immune system. Here is a test cleared by the FDA:
There are several labs here in the ‘hood where I live that can perform this test. If you are in a more civilized area I am sure you can find a lab close by.
If you donate blood, they test you for antibodies, and it doesn’t cost you anything but a pint of blood. :-)