My vote is on a virus.

The weed will hit you harder if you're already sick.

Happened to me recently too, but I needed the rest to get better from my virus anyway, so I didn't mind
TheSmokingMonkey Reviewed by TheSmokingMonkey on . Have you ever had a great trip... but a horrible 'sickness' days later? Hi guys, this is a long read so I'm sorry, but I'd really appreciate if some of you could take the time and check it out and see if you have anything to tell me, because I'm clueless and honestly a little worried about my well-being. I understand if you don't want to, but any insight at all is very much appreciated. So, here goes: Last Friday I had an awesome trip. I was laughing and I was DAMN high. I've never been an avid smoker, only ever having done it maybe 5 times in my life now. Rating: 5