Welcome to HCM.
The earliest manifestation of HIV
could occur only after 3 weeks of the high risk activity. Any other manifestation before this period could not be due to HIV. So your swollen neck and lymph
node enlargement are not necessarily related to HIV.
5 Days are too earlier for STD
panel also. There are tests available for HIV and STD after 3 weeks of exposure.
Wish you good luck.