Sorry to hear about that - there are a lot of different types of cannabis so you may be using a strain or method that is causing that. Do you know what type of cannabis you've been smoking? I will write something about how to pick the right types of cannabis for you - but a lot of people find that THC heavy products are more likely to give hallucinations. CBD, as well as many of the terpenes, can bring this down or eliminate it. You might try getting a CBD tincture that you can take when you start to feel too high like that. It can help reverse the effects even once they begin.