hello,my friends think i might have been slipped something in my drink, they think it was speed, please help..

Symptoms: it has been 3 days now that i have been feeling this way:           

Extremely light headed, dizziness, very very tired, can not focus eyes, hard time breathing normally, is this maybe possibly a side effect of a drug?? could I have been drugged?? I am not taking any prescrip. meds..

thank you