What I took definetely wasn't LSD - any idea what it could've been?

About 30-45 mins in, I get a horrible headache and start overheating, and needed to sit down. I felt this way for a little while, until my vision started to slightly distort. I eventually felt high, giggly, and a bit delirious. For God's sake I felt like I was in an episode of Impractical Jokers the way I was interacting with people at the museum. Needless to say, the headache persisted pretty much all night long. However, the next day my brain felt clear like that after a solid mushroom trip.

Edit: I forgot to mention the bitter taste