Seizures? Nerve Damage? or something else?

Im not exactly sure what I have. If its seizures, nerve damage or something completely different. I figured I would try and post on here and see if someone could give me some guidance. Im 24 and have no medical insurance, I do plan on going to a doctor and getting referred to a neurologist but im trying to wait till i get insurance before i do that. Here is some background on what i think the problem is. from age 18-22 i was a heavy crystal meth user and pot smoker. On 2 occasions I overdosed on meth, the side effects of an OD are psychosis, paranoia and the one if found most odd was that i couldnt control my eyes, they would move independently of each other on their own. I quit doing meth but continued smoking pot. Every time i smoked though i felt like a small electrical storm was happening in my brain followed by severe tingling and sometimes jerking motions of my limbs. I quit smoking pot because this was absolutely one of the most horrible feelings ever and would last for hours. After i quit i never had these up until about 6 months ago i took some unisoms to help me go to sleep one night and it gave me the same feeling of tingling and jerking of the limbs, and that feeling at the base of my skull. I went to my doctor (since i had insurance at the time) and he diagnosed it as a panic attack, prescribed me xanax and sent me on my way. The more i read on panic attacks the more i can see that this is not one. On top of this I have this feeling now every day. Sometimes on top of the feeling in my head and the jerking of the limbs and tingling, i also experience repeated physical movements such as pacing the floor or constantly putting my hand up to my face. Where my symptoms differ from what i keep reading is in how long they last they never last under and hour its always an hour or more. The xanax do temporarily take them away but after they wear off they are just as bad or worse than they were before. Recently I have also started experiencing sleep paralysis, impotence and pretty bad insomnia. Do you think these are seizures, that it is in any way related to epilepsy or that it is extreme nerve damage or something i havent even considered? Any help would be appreciated because im about to go crazy.