Kathleen I understand completely how you feel, BUT it is really important to carry on with the normal things in life, including attending planned events! I spent a year avoiding stuff cause I felt so awful and was left almost at the point of agoraphobia. I now plan things and make myself do them (every day) no matter what! If I feel crap then I may as well be out than sitting at home on my own!
I don't mean to sound harsh, I truly do understand how hard it is - but push yourself! If you need a safeguard, in the way of ativan or diazepam then ask for a small supply from your gp! It does get easier and the more I deal with stuff while continuing on with life, the better I feel and the less I panic ....
Ps I read Claire weekes' book and another called feel the fear - they are great for helping you see that the jittery feelings etc. are as bad as it's gonna get - I have the same with palps, but now I just try to ignore them and carry on