It was probably just decent bud and smoked a good amount of it. Crack has a distinct taste and makes your mouth and throat numb.
There are many people who suspect their buds must be laced with something, I smoked with these girls once and they were certain it was laced with pcp...but in reality they were just lightweights smoking good weed.

Think about it this way...other drugs cost money too, often times more than marijuana itself. Cocaine and its freebase (crack) are especially expensive so why would any drug dealer take ordinary weed and intentionally mix it with the more expensive crack cocaine just to resell at the regular price of the bud?
Im not saying its impossible, just improbable.