There's no one-size-fits all method - that's why it's advisable to seek out a professional who will work with you to determine the cause of such behaviour and what practically can be done about it.

At the moment, please try and partake in such activities as safely as possible. I know that can be difficult if a lot of it's done on impulse but you're aware that you're exposing yourself to the possibility of STD's - so at least schedule more regular health check ups/testing while you seek out further help.

Best of luck.