i am not familiar with what rerealization is, but it sounds like an experience i went through when i was your age.
i started taking psychedelics at sixteen, which was probably too young. the human brain is still growing and making connections, and its a key time in your life to start to become a mature adult and to begin interacting with the world and society as a responsible individual. i had been tripping at least once a month, pretty heavy trips, smoking pot daily. me and my long time girlfriend had just broken up and i moved away to go to school at a college where i didnt know anyone. sometimes i had feelings like what you are describing. that period was difficult for me, in a very existential way--i wasnt too sure of what was real or not on a very elemental basis. i was not having paranoid delusions but my own view of my self, my ego and how others consciousness tied in.
my recommendation is to reduce your drug consumption a bit. if you feel fried from psychedelics you might want to wait a bit before you trip again, and keep in mind that pot can have these effects as well. DEFINITELY do not try to remedy your feelings, or escape them with the use of other drugs. however, once you have meditated on these things for a little while it might be worthwhile to have some kind of introspective, therapeutic experience with something like MDMA--that is, if you think you are ready and can handle it. my MDMA use at the time when i was going through a similar experience helped me learn how to deal with others again, how to connect with other people from the inside, and importantly how to enjoy myself and have a good time, regardless of how "real" anything really is. i started integrating the things i learned and experienced on psychedelics into my life and learned how to move on and grow on the inside. but probably the most useful thing that i did was start to read about the psychedelic experience, to see that i wasnt alone in these feelings. many, many, many people have been through this before, and have written about it in detail.
erowid.org is a good place to start, there are good reports and threads on here too as well. i started reading books like the electric kool-aid acid test, the doors of perception, the joyous cosmology, be here now, etc. i started going to psychedelic events, raves and parties, and music festivals. i started meeting more like minded people and began to feel comfortable in my own skin again. sure enough after a while i was comfortable enough to start tripping again and have successfully navigated my psychedelic experiences with much more deftness and overall success.