Morning karenja! I know exactly how you feel! My anxiety came along with completely out of the blue along with loads of other symptoms, just when I thought that I should have been done with menopause!
The trouble is, it's completely out of your control, you have nothing to be anxious about, so you can't rationalise it and stop the feelings, it's as though something has taken over your body. Deep abdominal breathing really helps, and releases the tightness in the chest, but I found as soon as I moved, or thought about doing anything, the anxiety shot straight through me again! I am sure that the anxiety is the main cause of all the other symptoms like tingling in hands and feet, foggy thinking, loss of concentration, IBS etc., all can be linked to generalised anxiety.
I took Sertraline, which really helped, takes about 6 weeks to really make a difference but once you start not feeling anxious, the rest of you calms down. Our bodies get so worn out with the anxiety I think. Sertraline is one of the better AD's as it is non addictive. Other ladies may not agree and suggest non-medication, but it did help me.
I do feel for you, it is a vicious circle, you are anxious because you are anxious!
But you are not alone, it is the biggest subject on this forum!
Big hug WANDERER XXX