As Mike_no has said, there is a relatively low rate of risk associated with your exposure. A one time vaginal exposure is less than 2 percent if the other person has HIV and zero if they don't. Go ahead and test though to make sure. And using alcohol on your penis does nothing to prevent HIV.
Risk is low. It is seen quite often that it takes multiple exposure for a male to acquire HIV from an unprotected vaginal exposure. There are a million chances that your partner should have been HIV negative.
Your risk was relatively lower, you can take a test at 28 days with a IV Generation HIV test and move on.