The ANA test doesn't look for any STD. Syphilis testing is an RPR, VDRL, and a few others. A Hep C test will have hcv in the name of it.
The ANA test is looking for autoimmune disorders, like lupus, Guillain-Barre Syndrome, rheumatoid arthritis, and several more.
You weren't at any risk for Hep C - this is rarely transmitted sexually, and when it is, it's almost always from unprotected anal. Hep C is only transmitted by blood. The main way this is transmitted is sharing needles for drug use.
You weren't at risk for syphilis either, unless her mouth was on your penis, or your genitals came into direct contact while both of you were unclothed, and there was some friction.
Handjobs are never a risk for STDs, and no STD would give you symptoms the next day. The absolute minimum is 2 days, but most are longer. Syphilis is several days to weeks.
Continue working with your doctors to find the cause of your symptoms, but your massage activities are not the cause of them.