I’ve read all of your other questions. You clearly have some issues that you need to sort out and deal with. I will say again, and again, and again if need be, that you need to seek out some mental health counseling.
You mentioned that you have seen a doctor twice. What kind of doctor did you see? What did you tell them? What did they suggest? It doesn’t do any good to go to your doctor unless you are willing to tell them everything that you’ve told us. You need to let them know that you are depressed, anxious, have problems sorting out your problems. You need a good therapist, one that will work with you to help you deal better with your problems.
Maybe beating on a punching bag will help you let go of some of your energy, temporarily, and it will probably tire you out, but in the long run, you need to find ways to deal with your issues, so that you don’t one day decide to use a person as your punching bag.
I would also suggest that you talk to someone at your school, in the counseling department, to help you make some decisions about how your school life is going. You said that you are 18 years old and in college, but if you hadn’t said that, I would have guessed that you were about 15 years old. I don’t mean to insult you, it’s just that you sound somewhat immature. The counselors at your school should be able to help you with that. It also sounds like you’re having a very difficult time fitting in with the other students. It sounds odd to me that girls at your school would try to trip you. If this is actually happening, then something is very wrong at your school and the authorities need to step in and find out why everyone is acting like grammar school children.
As far as your relationships with women, at this point, it sounds like you are doing things, and acting in ways, that make people want to avoid you. Re-read your other questions to see what I mean, so that I don’t have to list everything here. Again, you should seek some type of mental health counseling, along with getting help with your school counselors to help you to figure out if going to this school is a good fit for you, and how you can learn to deal with your negative emotions in a more positive and appropriate manner.
I wish you the best of luck. Please check in with us and let us know how all of this is progressing.