Case History: I had a protected vaginal insertive sex (15 secs) in a spa (condom was intact as I can see sperm in it after the act) with licking nipples (not lactating for 8secs) and light fingering vagina (for 5 secs)/no oral kissing or oral sex. I only did four or five body kissing .I took place in 17th July .After the act the girl took off my condom and I straight way went to wash my penis with water and my hand. No other exposure after that. I was so tensed that I convinced the girl to go for blood test with me for HIV 1&2 also no with p24 antigen (4th generation)/HBSAg/HCV/VDRL) all came back negative. I tested my self to in 10th day/15th day/18th day (4the generation test with antigen p24) all came back negative. Question is am I safe or I still have a chance to catch this. I know straight forward answer is if both are negative then no chance however as I google further in this I found a concept of window period hence I got tensed l, because the lady being a spa girl provide a like services to others. So just want to know if I am safe. Do I need any further test?