marijuana withdrawal

i started smoking marijuana when i was about 14(i'm now 18)..i decided to quit smoking marijuana one night when i was hanging out with friends, we did mushrooms and i did not like it at all..after i burnt out from that i was feeling alot better so i decided to have a few beers and smoke a few joints with my friends..at the end of the night i went home and had 1 bong hoot and it was a different high then anything i ever had, it seemed to be concentrated at my face and it felt like it was puffy kinda.....ever since that night (a week and a half ago) i havent smoked any marijuana (i've had a few drinks still but that was days ago)..but anyways since that night i feel as tho i'm constantly buzzed(sort of a mild high mixed with dizzyness)...i have a hard time falling alseep and when i try i feel as tho my body is tingling in different places at a time, i have frequent headaches and the back of my neck always feels stiff...2 nights in a row my body has spontaneusly became very hot like i have a fever or somthing........i'm pretty freaked becuz i dont know whats happening to me....i told my mom about it and she said that it is marijuana withdrawal...i want to believe thats true but i cant help but thinking that the mushrooms i did that night have screwed up my brain somehow....i feel anxiety, emotionless at times and uncomfortable at other times...i do smoke cigs becuz it seems to be tha only thing to keep my nerves mellow...i'm pretty freaked out and i was just wondering if anybody has experienced this before or if they know any helpful tips for me to get back to my old self.....