Welcome to Healing Well and to the A & P forum.
I am sorry that your having a hard time. Yes I too have had the shaky feeling inside however I have a hand tremor so that gets worse with high anxiety.
Have you seen a physician yet for your problems? A medication may be indicated and Lyn mentioned CBT..........
Moodgym is a free self help program to teach cognitive behaviour
therapy skills to people vulnerable to depression and anxiety.http://moodgym.anu.edu.au/
I have not used it but several members have and have liked it. Nothing should take the place of your therapist if you are seeing one.
Please stay with us and keep posting. You are family now.