Anyone else having extreme anxiety?

This is my fifth pregnancy, and for the very first time I have had such overwhelming anxiety and ridiculous hormonal mood swings. I have felt like a complete nut job a lot of the time. I feel like it gets worse and worse. I worry about stupid stuff (i.e. once I move my son into his new room the big tree behind our house falling onto his room and killing him) and I get upset crying or raging mad out of nowhere. It's so completely unlike me! Anyone else experiencing anxiety like this? It's more than I can handle at times.

I plan to talk to my doctor tomorrow about it at my 24 week appointment.