In your post in the HIV forum, you said you had a condom on.
That means you had no risk for anything except possibly herpes type 2, HPV and syphilis, and those are low risk.
There is no STD that would give you swollen nodes on your arms, and if you have a condition that gives you swollen nodes, you need to see your doctor. Most of the time, we are not good at diagnosing our own swollen nodes, and need a doctor to do it.
With no symptoms at this point - no sores or anything - I wouldn't worry. See your doctor about your lymph nodes. They are not related to an STD or HIV.