Talk to a therapist, write your feelings in a journal, get a good amount of sleep, exercise, eat healthy, don’t isolate yourself- socialize, meditation, create and stay in a routine, clean and organize the space around you, relax by doing things you enjoy (warm bath, watch your favourite tv show, etc)
As you age, you realize that the way you eat might effect how long you live. Eating too much or too much bad things can give you lots of medical conditions, and you realize that as you get older.
Not making his/her status known to the person the transactional sex is conducted with.
Unprotected sex when indeed infected intensionally or unintensionally
hope it helps