Yes, a tad dramatizing things out of proportion. You are an adult, you can go to the bathroom without being texted. Maybe you had to do more in the bathroom. Maybe one of your parents asked you to do something afterwards.

You are the one who did something "wrong" by staying downstairs for two hours. It's not a funny joke; it's abandoning your guests for no good reason.

Can you think of a better way to handle this in future? I mean you felt needy or ignored - you could address it with them in some way instead of doing something noncommunicative that could end up appearing passive aggressive or worse.

I am not criticizing you, just passing your actions through the lens of what is expected as I understand it. I know you did it because of your feelings, and we often don't handle our feelings well. I think this is an example of that.