here is a picture of a swollen lymph node:
Most bumps on your body are not swollen lymph nodes - you only have lymph nodes in very specific places (e.g. your neck, your armpits, your groin).
This does not sound at all like a symptom of HIV. However, if you believe you are at risk of HIV (what kind of sex? with whom? you can only get HIV from someone who is HIV+, and not all types of sex are equally risky), you should get an HIV test, which should ease your mind.