@Norm34atw,
Norm34atw, people experiment with sexuality in all sorts of ways. It's part of growing up and learning about your body and how it reacts to certain kinds of stimulation.
But, the fact you are concerned, three years later, about some things you did over a three day period at age 13, does concern me, particularly because these memories caused you to have a recent "meltdown" that went on for over a month. You are obviously feeling anxious about your own sexuality because you don't understand what those past behaviors revealed about you, but your anxiety is occurring in the present. You need to deal with the anxiety you are feeling right now, so it doesn't continue to overwhelm you.
Curiosity about oneself is healthy and good. You should want to understand why you did those particular things three years ago, especially because those things continue to trouble you now. This is not just a simple question of whether you had, or have, homosexual feelings, it is really more complicated than that. There are loads of reasons, other than homosexual feelings, that could cause you to act in certain ways. It sounds as though you had a generally difficult home life and childhood. You need to seek some help in finding some answers that will help you understand yourself better. When you have a better, and fuller, understanding of what is upsetting you, in the present, your anxiety will decrease.
As well meaning as the people at A2K are, I really don't think that anyone here can give you the answers you are seeking, mainly because we don't know you well enough to do that. We know next to nothing about you, except that you are trying to deal with some very important and serious issues in your life regarding your sexuality. You deserve to have these issues considered by someone in a serious manner, and in a confidential setting.
My suggestion would be that you meet with the school psychologist at your school and tell that person the information you've revealed here, as well as what you went through during your meltdown, and what you are still feeling. Be as open as possible, so that the psychologist can really get a sense of all the things that might be troubling you. The psychologist won't judge you and won't think you're crazy. But it is very likely he or she will help you to understand yourself better and to get the past into some better perspective so that it will make sense to you at this point in your life. Everyone goes through a stage of self doubts, and questioning themselves, particularly teenagers. Psychologists, particularly school psychologists, are quite used to hearing these issues and helping teens sort them out and deal with them.
So, please, Norm34atw, don't continue to struggle with your anxieties about this all by yourself. You made a good start by posting here. Now take the next step, and seek some professional advice, even for just a session or two, with your school psychologist or with any other reputable therapist. Then let me know how it turned out.