I live in a hostel. I am new to the hostel. Yesterday was Sunday so four of us gathered to have a party. We had cold drinks. I don't have a glass so I poured some of the cold drinks in my water bottle. Next a call came to my phone so I came out of the room to talk. Next when I entered the room the boys were laughing at me and telling something about my water bottle.I felt something odd about it. Then I drunk the cold drinks with hesitation. Next when I reached my room some odd thought strike my mind. Why were they saying something about my water bottle? I didn't feel well. Had they mixed anything like memory Power decreasing drug to my water bottle and cold drinks? Though I am alright physically right now but that suspection has not gone off my mind. Yesterday I could not solve any questions in the class. Had they mixed something like memory decreasing chemical to my bottle? Or is it just my suspecting nature? I am in a state of great tension please help.