"I am extremely worried and do not know whats going to happen. I requested a army trial defense service and I am waiting for them to contact me next week. I am a PFC and I graduated AIT in November so again, Im not that familiar with military regulations. what can I expect from all this?"
This is pretty short and easy: You can expect to be discharged.
If you're super lucky, that will be a General-UHC but more likely a General-OTH. If you've never had any disciplinary issues this will be a short administrative discharge. You can of course try to fight it and take it to court-martial, but you're going to lose and that comes with stiffer penalties. Your Area Defense Counsel will talk you through your options but this ends the same way no matter what : You're done with the military.
At some point you'll be notified that you are in non-participation status. That means no attending drill etc for pay or points. You'll be notified by your First Sergeant when you can come in. You'll sit with the Shirt and the CC, get a butt-chewing, sign some paperwork, and clear out your belongings. You'll either outprocess at that point or they will have already initiated your outprocessing and you'll only have some paperwork to do. Then you're done. You'll get a package of paperwork in the mail with your discharge and the supporting documentation accompanying it.
That also costs you your VA benefits. You lose your GI Bill, tuition assistance, VA home loan, health care -- all of it.
I had an airman I supervised go through this. I learned more than I ever wanted to know about military drug testing, etc. He wasn't even arrested; he just popped on the urine screen. You're in a deeper hole than that. There is no option by which you stay in the military. The options are about the type of discharge you're getting and any other punishment they elect to level. That's it. The fact that you are all done with the military isn't going to change.