I might have smoked moldy weed? what should i do?

You'll be okay: I'm going to assume that it did not trigger an attack of asthma that took you to the emergency room. This isn't the place to talk about whether legalization will make the product safer, or that smoking anything isn't really doing your lungs a favor. The greatest danger of 'weed' is doing something silly while you're high. Be careful, and make good choices.