Weirdest thing.....

Ok I'm currently 22 weeks pregnant with my 4th child. This evening I began laughing hysterically for no reason then it turned into full on sobbing. Then I was doing both at the same time. Literally made me feel like I was losing my mind and I couldn't control it. I've never experienced this with any of my previous pregnancies. And I'm talking about laughing so hard I could barely catch my breath and crying so hard my face was soaked with tears and it was sad kind of crying. I know my last blood test said my hcg levels are a bit on the high side so I guess I'll blame it on my hormones lol. Just wondering if anyone else has experienced this?