Hello Anna
You would not believe the number of odd symptoms people get. I am in a support group and there are some people dealing with this for over 20 years. They report that they have experienced a new symptom that they never experienced before. You would think that after 20 you would have experienced them all. However, that not the case and in my case I had similar symptom to you regarding pain and muscles tightening up (however not to immobilization). At the time about 20 years ago for me I did not know what’s was happening and this is what makes the symptom worse is that you work up in your mind that something must be s wrong with you. You will see this in the first couple of session that this is a common thought when you do not understand what is happening to you. If you have been fully checked out by a doctor and there is nothing physically wrong that they can find, than this you must accept. If they have determined what you experienced, is anxiety or panic attack then accepts the doctor’s diagnoses. In addition, start on working on yourself through the program. If there is one thing that I can say is that the symptom are distressing but not dangerous, in other words you are not going to die.
Dizzy