What/why am I feeling this.

[Revisily]

Hello, I'm new to this, but I recently joined the military and after a while I broke mentally. I thought that it could maybe be ptsd (my dad passed 5 years ago and i thought basic couldve triggered it.), but i looked and it could be so many other disorders, etc. I don't know what's going on with me. I feel like I'm trapped inside a void. Like I'm watching myself do things I've already done. Every time I sense that I've done one of these events my body goes into panic mode. Like even right now, in this moment my brain is telling me I've typed on this website before, which is not the case because this is my first account and it really makes my body as a whole freak out, my heart feels like it drops, my body gets chills. Also another thing is that I'm stuck inside a barracks all day and can't go anywhere or do anything to help relieve this. This is literally my only option to get help as of right now, even the military won't help me as they're currently medically discharging me. (I passed Basic Training, currently in ait. 18 y/o.) I just want to find a way to make this feeling of familiarity and worry go away, i know it has to do with anxiety, but it just feels too much, and its hard for me to handle at times. I just want to have the security in my mind that ill be able to see my friends and family again without getting this feeling that im going to relapse and go back in time to basic (physically and mentally).