Hi, You have taken a very big risk on both occasions by having sex without condoms even if it was for 30 seconds. There is enough chance of infections getting transmitted if the women were infected on both occasions. There is a risk of getting infections like chlamydia, gonorrhea, human papilloma virus, herpes virus, syphilis and also infections like HIV and hepatitis B. You must know if you are infected with HIV infection. Early diagnosis and management is the best way out. Even if you have no symptoms, there are conditions which can remain dormant for few weeks to months and then cause the illness and HIV is the most important among them. For the rest of the condtions, you may wait if you get the symptoms. Please use condoms for sex always.