Can you give any more information? What did the weed look like? Did anyone else smoke it with you?
Can you not feel anything? How about on your tongue? Your fingertips? Have you had someone else (friends, family) test your senses? Don't be embarrassed. How about your sense of pain? Gone entirely?
Check for touch first. Smell and taste can be too hard to discern. The brain is a funny thing, and weed definitely affects your sensory input. Part of what might be confusing is that you find equilibrium with your environment, so it's hard to test senses without large changes in their input.
How about your thinking? Besides what stresses you out about this, do you notice any very intrusive differences?
When you're affected by something, the first thought is always, "is this permanent?". That's too hard of a question to answer. Your knowledge doesn't go away, but most people don't have their lives ruined from smoking it once.
Weed is definitely more than it's made out to be. Because it was your first time, it might have upset you more than the friends who probably gave it to you. Your body knows what's best. Don't smoke any more of it, although it calls you to figure it out. That's the trap.
All the weed I smoked has done nothing special for me, by the way.