Derealization and jamais vu and I don't know what to do.

I've been suffering from derealization and jamais vu for three days now. At first I thought it was due to alcohol withdrawal (I drink a lot and recently decided to take a month off just to make sure I can). However, I had a drink yesterday, which should make the withdrawal go away, and it didn't.

The only other possible cause I've been able to find is marijuana use, which makes perfect sense because I smoked a ridiculous amount of pot right before it started. But it has been three days and I would think it would have stopped by now. Have I damaged myself permanently? What can I do?

By the way, I'm broke and uninsured.

EDIT: More information: this wasn't the first time I smoked marijuana. I also am a bit confused and slightly dizzy, but only very slightly on both cases. I also have had a very reduced appetite the last few days.