Do i have a mental problem?

i feel like i space out a lot and like i'm slower than everyone. i'm not dumb in the sense that i do bad in school, that's never the case but when it comes to everyday things i feel kind of retarded. i also tend to be very forgetful and i cant seem to retain new information unless i can relate it to something my brain already thinks is important. i'm 19 years old and when i was like 14 or 15 i used to mix a lot of house products together in water bottles such as water, laundry detergents, mouthwash, toothpaste, hand soap, and whatever else i could find. i was "doing experiments" and i put clorox bleach in it and the liquid turned orange, then a dark green. after that, i don't know why but i sniffed it and i felt my nose numb up and the numbness reached all the way to my brain. could that be the cause?