I've personally foind my vocabulary and eloquence improving over the law few years, which is how long i've been smoking heavily.

Recently I haven't been smoking heavily at all, though, and it's only recently that i've realise my vocabulary increasing. So has smoking weed increased my vocabulary and eloquence over the last few years nd i've only just noticed it, or has it only started improving since I stopped smoking heavily?

I've been trying to figure that out lately.

Anyway, I recommend you just take a break from smoking for a while. Seriously. Whenever somebody says "I've been [insert problem here] since I started smoking heavily" the best advice is always just to take a break, see if the problem persists. If not then you know it's the weed, if it does then it's safe to say you can carry on tokin.