What Causes Nausea,diarrhea And Headaches After An Episode Of Black Out?

Hi Doctor, I was out at the weekend and i didnt drink much and i completely blacked out my partners believes i was spiked, then this week i have been constantly feeling nausea and been sick, diarrhea, head ache, tummy pains, hot and cold flushes, my mind not focussed it goes away in the evenings and when i eat but then but comes back in the morning and afternoons? Please help.