D.R.
Bless you, J.!
I can relate to may of the things you said. I first experienced a panic attack at age 24-but didn't know what it was. Now at 50, with a 21 year old daughter and 12 year old son, I still get them occasionally, but now know how to manage them. Ironically I am a therapist who works very well with children experiencing anxiety.
You are definitely on the right track looking for someone who specializes in anxiety.
I have some more suggestions that I hope are helpful...
First, know that when you are feeling anxious you are in your head, in other words, either ruminating about something in the past, or perseverating about somethng in the future. Getting back into the present moment and grounded in your body can be helpful..breathing deeply, listening to calming music,etc. I have a sound machine that plays ocean waves. There are CDs that play sounds in from nature that you can buy. Also, I have found that exercise and being outside is essential for my well being. Take a walk during your lunch at work, if you can.
I also agree with you about "the change" thing. In my late 30's the anxiety came back from time to time. Hormones can play a role. I went back to a therapist to process some things. You may not need to see a medical doctor (they give me anxiety, also and my dad was a physician :-). There are psychologists and social workers in Austin who are wonderful.
A few more suggestions...if you can afford acupuncture or a massage, these can help also.
Cut out caffeine! Get plenty of sleep. Know that many people share this with you (including me). It's even helping me to write this to you, knowing that I am not alone with the anxiety thing. Our society has become so hustle bustle that our brains are frequently on overload. We're producing too much cortisol and then we feel jittery.
OK, sorry to ramble on. I hope it gets better for you. I'm sure it will. Good luck!
D.