Wanted to let you know that ive had this problem too, its normal, not weird, and you completed a great first step - every time you have to deal with this situation, remind yourself that you got the courage up once, you can do it again.
I started shaking, trembling, and my heart started racing when filling out some VA forms - it brought up feelings of incidences that happened in the military, and it brought up feelings of failure because it had to do with why i got out of thd military sooner than i wanted to, and it made me think about how much i miss my old job, that i cant top it, i loved it, and will never have that job again. But my husband helped me through it, i took a break, some deep breaths, and was afraid that my benefits would not get approved, but my husband reminded me to tell the doctor about how i reacted to filling out the form, that proves that thinking about the past incidences affects me so badly.

Dont give up, keep on your good roll youve got going, and find ways to keep your suffering from getting in your way. Do one step at a time. Good luck!