Experiences - Swim needs help

[WhoAmI]

swim has rolled once before and everything went fine, he decided to roll one night while his girl friend was over, everything was fine at first, he danced and had fun, when he came down everything seemed fine but then things went bad, he became very talkative and said everything that came into his mind, he also had alot of energy, he became paranoid and talked about things that didnt even matter like his neighbors watching him. He then decided to try and sleep it off but he was unable to fall asleep. He just layed on his bed staring at his sleeping cat. He thought alot and went through situations that made him very depressed to the point that he wanted to cry,then he would think about something else and he would feel better. Even the slightest thing would make him feel horrible, for example his cat got scratched on the nose, seeing this made him freak out. He then got the idea that weed would calm him and help him sleep,it didnt. Swim thinks that it might have been meth or lsd but doesn't know. The next day he was very depressed and irritable. what could have caused all this to happen?