Is this weird?

So I've realized ever since I was little I get the urge to laugh instead of cry in serious situations. And if I dont feel sad at all then I literally have no emotion towards it at all. For example, my son was diagnosed with a serious peanut allergy, and when the lady told us I had to hold back a laugh. But in my brain the situation was very sad and overwhelming to me. It's super weird and annoying. If somebody throws me a surprise party I have to literally pretend to act surprised. In my brain I'm so excited but I literally have to exaggerate so hard to look excited. I feel like a robot with no emotion sometimes.

Is anybody else like this?