so sorry to hear bout this. keep your eyes peeled and see what is too much of a coincidence i.e the people around you and how you feel after. date rape drugs are virtually undetectable after the first 24 hours, so within those hours take a urine sample in a clean container (in case something, god forbid, were to happen) this would be your only evidence, turn it in to the e.r , police or your local rape crisis center.
hopin this wont happen again because with all the weirdo's out there...you just never know