We're not here to scare you, but yes, there is always the remote possibility that you could ingest something inherently toxic in the process of trying to use drugs illicitly. I do say remote though, because it is highly, highly rare to end up ingesting something extremely dangerous in this manner. Contrary to what D.A.R.E. has taught us American kids, drug dealers don't purposefully poison their customers as if they're some kind of super-villain from the movies. They want you to keep coming back and there is absolutely no incentive to cut their drugs with something dangerous. In this way, capitalism and the free market actually tend to keep you safe.
What I would recommend, is getting sleep, eating well and like T. said, taking some vitamins and doing whatever you can to help reset your body. I don't think that you've done permanent damage and I don't want you to stress yourself out over that possibility. I would just assume that you're fine, but that you've drained yourself a little bit. It can take several days to recover from extreme stimulant binges and residual symptoms like depression can persist for a longer period of time.
I would wait and observe before freaking out. I would put my money on you being fine.