My friends losing his mind rn because he was out

My friends losing his mind rn because he was out with a girl he just met and after the fact of the matter he found out she’d been snorting meth not to long before tongue kissing him and same thing happened later that evening but was sexually active w her as well so he’s worried also about the sweat from body to body, He thinks his weekly drug tests are going to come up positive I really am hoping to ease his mind w some of your feedback. We are going to grab him a home test tomorrow but for now he need your words. from experience or straight fact knowledge. Even if it’s not what he’s seeking to hear. Please and Thank you brothers and sisters ahead of time.