Thanks so much for your replies!
I feel so much better knowing that this isn't something I was dreaming up inside my head.
Tsohl: What you describe of your son's behavior in a noisy restaurant was *exactly* how I felt last week while sitting in the waiting room at my pdoc. The noise was overwhelming and so bothersome I couldn't wait to get home to enjoy some peace and quiet.
Seaturtle: It sounds like you and I have similar symptoms of hypomania. I also start off feeling euphoric, but it isn't long before I feel angry and irritable -- much more than usual.
Simple things set me off and that's not like me. I normally have a high level of tolerance, but for the past several weeks, I've felt like I'm about to explode emotionally at the smallest frustrations. I like your idea of deliberately staying away from people. That's something I'll have to do as well because the last thing I want to do is to hurt people unintentionally -- especially when it isn't their fault that I'm reacting the way I am.
lizajudy: I'm glad sound sensitivity is no longer a problem for you.
It's ironic you should mention hearing music that isn't there. I've had that happen to me as well. Sometimes the music is so loud it keeps me awake at night.
Pieke: I like the idea of wearing an iPod while out running errands. I'll have to give that a try especially when the sound sensitivity is the most bothersome.
By the way, I saw my pdoc on Friday and wrote out a list of all my symptoms which included sound sensitivity. He said it sounded like I was/am manic, so that tells me sound sensitivity is indeed something that is experienced during hypomania and mania (something I didn't know before reading all of your comments).
Thanks again to all of you for your responses!