Highly sensitive people are often highly suggestible. That means you’re the kind of person who absorbs distressing ideas more easily than other people. So — get off the internet sites that talk about ghosts and craziness. Don’t go to scary movies or watch violent or scary TV shows. I even suggest you read the news, not watch it. You need to develop more “shields” before you can afford to put yourself in the way of disturbing material. So — yes, go back to therapy. Work on developing stronger coping skills. You already know therapy helps so why hesitate? In addition, watch happy movies and search the web for inspiring stories. Fill your mind with things that make you feel good, not freaked!
As for the medication: Yes, you need to take the right dose at the right time every day in order to build up and keep a therapeutic level. You’re a smart young woman. Come up with a system so you won’t forget. If there are no young children around who can get into it, think about putting the bottle under your pillow so you are reminded every night or morning (whenever you are supposed to take it.)
I wish you well.