Has anyone experienced an almost psychosis?

My situation is: About 30 minutes after smoking 5-6 puffs of a joint i felt a psychotic episode coming on, so i splashed water on my face and tried to ground myself in reality. i managed not to have an episode, but ever since then i have felt different.. almost like i could break into an episode at any moment. I luckily haven't broken out, and have been able to function fine, but the feeling is always there and it is starting to concern me a lot..

This all start about 8 days ago. Im curious to see if anyone has experienced anything like this.

Thnaks