Relax dude, this is a common problem ,we call it pericorinitis, ( wisdom tooth gums raise to a size & break, leaving a white mildly painful ulcer, it is not associated with your unsafe sex. Meet a dentist near your place , if required the dentist will remove that excess gum & check the tooth erupted direction & advice some mouth wash. Unsafe sex has to be avoided ,use condoms , carry few in your wallet for safety in case of emergency.