Uncontrollable laughter

So basically I laugh at super inappropriate times, at times where there is no stimulus to actually want to laugh. This has caused distress for myself and others bc well yam it dosent happen at appropriate times. Then when I start laughing, I can't stop. I feel angry but am laughing too. I often cry afterwards too, and i also cry for no reason. Alot of this is embarssing and effects my jobs. So this has caused some issues in my life. Wondering if anyone on here can explain this? I have manic episodes but not a concrete bipolar diagnosis atm.