i still feel mildly high after 6 weeks?

i am 15 years old and smoked weed for about the 7th time about 6 weeks ago. i had a lot more than i have previously had and tripped out and i wasent used to it, i hated every second of it. that night i only got about 4 hours sleep because i was so scared it would last for ever, when i woke i still felt the same. now 6 weeks later i still feel mildly high, when im concentrating on somthing i feel ok and back to normal, then when i get up and walk around and think about it, it effects me. im scared ill be like this forever! has anyone else had a simular expierence? or does anyone no how i can get back to normal? thanks a lot.