Condom either works or fails catastrophically. Your condom did not fail so your risk never existed. Next time, use water base lubes if needed. Symptoms do not mean much, because similar symptoms can be experienced due to other common infections, therefore the symptoms are often confusing and misleading. It is your guilt that troubling you.
Though you do not need a test for a protected exposure, you may do so only to get peace of mind. Your 5 week antibody test was reassuring though, but not conclusive. You can get yourself tested for 4th generation Duo (Antibody+Antigen) anytime now, collect your conclusive report, lay all your residual worries to rest permanently and move on with your life normally.