you both can get tested>>>.. i guess u r in fear of u might cought hiv by your boyfriend..so talk to him,abou hiv,he might have done unprotected sex with a girl of unknown status...
about the lymoph node,its the 1st site for body defence mechanism,,anything wrong happens u get your lymphnodes enlarged..so don't worry... just get tested u will be sure.
The most common symptom of HIV, is a high fever that lasts foer a couple weeks, any number of things can cause lymph nodes to swell, and with hiv its very noticeable, usally bigger than a pea, normal lymph nodes are pea size, just go get tested to ease your mind, you should be fine, odds are in your favor........