the window period

hi there

acute HIV infection not causing lump in armpit,SOME time it cause generalize lymph node enlargement.
regarding the test ,3 months after exposure is conclusive,try to understad most of people 95% of people produce antibody t 25 days,the renaming 5% produce antibody between 25-90 days.so if you had unprotected anal or vaginal sex,you should test again t 3month .

I agree with Muhamad, to be conclusive you should do the HIV antibody test beyond at the three month point. If you are is still experiencing symptoms after that, you should consider testing for HTLV.

Best wishes.