Welcome to HCM.
antibody tests are persistently nonreactive since 6 years after your suspected exposure. It means you are not at all having HIV and no chance of HIV due that past exposure.
There is no strain like that not being detected by existing tests. So you need not worry about HIV at all.
All your symptoms may be due to any seasonal viral or bacterial infections. If you get it frequently you can raise your immunity with diet rich in Vitamin C
If you approach your physician, he/she will guide in this regard.
Get well soon.