Its possible that it was laced, but you also had to have some bad reaction to the weed or whatever was laced in it, and a panic attack in the process.
It kinda reminds me of the time my weed was laced with PCP and I didnt know it, I smoked/ate a whole 20 bag at once and had possibly the worst/scariest nights of my life, it lasted 8 hours. I wish I could tell you that everything was good after it, but that was over 2 years ago and I havent been the same since. Whether you have a health problem or a mental problem or not, some people forget that horrifying drug experiences with stick with you just like everything else. Its traumatizing and it will cause psychological damage similar to having a near death experience. Ive had horrible panic attacks and they are just as bad. Like a mind scar it will stick with you, but stay strong and you can live with it and say you survived and live through one more thing.
The way you describe your thinking, it sounds like you definitely have anxiety and possibly OCD (obsessive compulsive disorder). I have these as well to a degree that it sounds very much like the way I think. Everybodys different so youll have to figure out what makes you better, whether it be medication, lowering you stress level, etc. Panic attacks and anxiety can cause numbness in your body as well. A neurologist is a good idea just incase something is wrong. Look up some of your symptoms and what can cause them on the computer too. Other than that just try to balance your life though, eat more healthy and every few hours, get 8-9 hours of sleep every night, try to get 30 mins of exercise everyday, multivitamins and fish oil is a good idea. Just do what u gotta do to get better, I know it can be extremely hard at times but its very possible.