OK so about two months ago I took a rather large amount of DXM in the form of two bottles of Robitussin and a bottle of some wall-greens brand cough syrup, I think it was about 1100mg of DXM. I took all of this in a three day period and on the third day I thought I was a goner for sure I was shaking,I had hot and cold flashes, and just this crazy rushing/tingly feeling in my head.I honestly thought I was having an overdose,but after a while it just went away and I got to feeling fine again. But just last night I had the same experience not with DXM but with weed I was finishing a joint when I felt that weird feeling all over again.(now I do smoke a lot of weed typically in the evenings before bed) I got the same shaking the same weird feeling in the head and the hot and cold flashes.But now that weird feeling in my head wont go away its like I am stoned but not really stoned,if that makes any sense Its just really hard to explain.....all I know Is that I have been smoking weed for along time and I have never had any thing like this happen to me,and to be honest It has me worried.So If someone could please tell me what they think the problem might be, and what I should do next would be greatly appreciated.