On my first time, I got high as hell, and I remember the way he did it was that he told me not to think about it. When you're smoking, just try to talk to your friends and just start a conversation. Sooner or later, your mind should wander off, then you finally come back and realize that you're high. That can be a way to stop overanalyzing things. Just try to keep your mind off of it.

Also, imo, bong hits are easier to take. You can try smoking out of a bong, put some ice in it and chilled water. It'll cool the smoke and make it easier on your lungs.

Lastly, sounds like the weed you were smoking was an indica, but I dunno. I really don't know much about weed. >_<