Weed Hangover = Bad Bud?

Okay, so this has been on my mind for the past hour and I'm dead curious. Today, my friend went to buy some dank stuff near downtown. As soon as he arrives home, he calls me up and asks if I wanna chill. Of course, I accept with gleeful colors and drive over shortly.

We light a bowl, relax for about 20 minutes and go see a movie baked like a couple of neo-wizards. Two hours later, while on the way home, we stop by the bar and get some drinks. At this point, we're both buzzin' and having a good time but on the way back to his place, I start to feel sore in the passenger seat. The muscles in my upper back and thighs are throbbing with an eerie-like pain. I mention it to him but we both shrug it off and continue to converse. Upon arrival, we smoke one last bowl and start to play some Super Street Fighter IV before hitting the road to home.

About three hours later, I'm safely sitting on the couch stewing over a hazy high and decide to pop in Super Mario Galaxy 2. Not even 15 minutes in and I begin to doze off, leading me to fall asleep with the TV muted. Two hours pass and I wake up with an ill headache. It could've been the alcohol but, regardless, the "hangover" feeling is not something I'd be interested in experiencing again...

So, my fellow blades, did my friend buy bad weed or is it just me?

EDIT: Just so you know, this has happened twice with the same friend and we didn't drink during those times. I'm not concerned about the whole situation so don't assume I'm in a panic.