my doubts

hi dr i had sex with a csw only later realised i had a cut on the side of my penis then one month i didn have any symptoms except once i had diahorrea but otherwise i was ok but the second month i had pain in my stomach and have body pain too even now .I tested about three weeks and my results came negative can i be sure with this or i am at risk but after 5 or 6 weeks i felt feverish and had slight sore throat and body pain still continues also running nose in between i had a swelling in my armpit which went of now i am so worried and confused not able to concentrate on anything i will be doing my third month test soon is the third month test a final test to find out for hiv and can i be sure later i don have to check for hiv