Last Night I Used M Eth "iv" And Shortly After

Last night I used m eth "iv" and shortly after I got really bad pain in my lower neck. So I turned it to pop it a nd it felt like it popped ten times with one turn and right after I got a sever headache that lasted owner an hour. It was pounding so bad I had to lay down. I have been clean off meth for
lmost 2 years when I used daily and never felt that. Except last night when I relapsed.