Hmmm...I wish I could calm down. I'm just not wired that way. I am going to explode. I don't even want him near our son.
Well, for your son's sake, you NEED to. Do you have a close friend, or a family member you can talk to today?
I'd also strongly suggest calling your physician and asking about ADs, including the "take immediately for anxiety attack" kind. They were a LIFESAVER for me.
I do know how you're feeling. When I saw my wife meet her OM in a parking lot, and get into his car and drive to his house, I had a panic attack. I'd never had one before. I couldn't breath, couldn't drive, and it felt like a big fat person was sitting on my chest.