It has become fairly easy to over-consume cannabis especially with regards to edibles, which can take up to two hours to take effect.
Luckily, there is one known remedy to over-consumption of cannabis which is to take another form of cannabis. CBD, the non-psychoactive component can help users calm down after they have over-consumed THC. The science behind this remedy is that THC is attached to the endocannabinoid receptors. When CBD is consumed, it fills these receptors so that less THC enters the system.
With this said, if you feel as if you are too high, make sure to remain calm, take a seat, and try to have some water. Remember you cannot overdose with Cannabis and it will eventually pass.