Panic Attacks Before Drill 2nd LT

I commissioned as a 2LT this past May into the Army Reserves, and I've been attending drills with my unit for the last few months. I've been having a rough time due to some things that happened at Advanced Camp.

At Advanced Camp, I was sexually harassed and assaulted by this guy in my platoon. Basically he told the other guys in the platoon that he wanted to hate rape me. At one of the training areas where we had to sleep next to each other, he would sometimes touch me in his sleep. One of my friends reported him, and he was kicked out and not allowed to commission.

Things have gotten worse for me mentally since I commissioned. I had a panic attack while I was getting ready to go to drill the past two times, and this has been affecting me in the civilian world too. I have a good job on the civilian side that I want to focus on, and I want to resign my commission. Every time I'm in an Army setting, I can't stop thinking about this. If I tried to resign, would it likely to be approved? What would the process look like? I was a non-scholarship cadet, so I don't have to worry about paying back scholarship money.