note for the future: don't IV ecstacy tablets.
if there was MDMA in there, I read the rush can be so strong it's scary, take a benzo to calm down and wait it out, and if you feel like your life is at risk immediately call the ER.
Yeaahh, definitely don't IV pills. Especially not clandestinely made ecstasy... it's not going to be sterile in any sense of the word and I really doubt you were able to filter out the binders sufficiently, considering your reaction