Thank you very much for your question. I would strongly recommend that you see a primary care or urgent care physician for further evaluation. To answer your question, yes it is possible to become infected with HIV if the condom breaks during sex. Laboratory studies show that latex or polyurethane condoms are impenetrable to the HIV virus particles, but if the barrier is compromised (through a tear or break) there is no guarantee of protection. Based on the data that we have, condoms are approximately 85% effective in preventing sexually transmitted diseases, including HIV, chlamydia, gonorrhea, syphilis, herpes, and human papillomavirus (HPV). If the condoms are consistently used in the proper manner, the rates of prevention are likely to be higher. Antiseptic and antimicrobial products such as Dettol and soap, respectively, do not prevent the transmission of HIV (the virus is transmitted through bodily fluids). Given that you have been sexually active without proper barrier protection, you and your sexual partner(s) should be tested for sexually transmitted diseases, including HIV. As mentioned above, I would strongly recommend that you meet with a primary care or urgent care physician to learn more about how to properly prevent transmission of these infections, in addition to being tested for them yourself.