(((Katie Kaboom)))
I believe body memories.
I'm actually quite impressed that you've made the connection between touching areas of your body and triggering -- that is a level of awareness that I'm still working on. For me, there were areas of my body that I could not feel at all, and that really freaked me out.
I read a book on Trauma called 'Waking the Tiger'. The author talks about how our bodies are wired, and how we hold trauma in our body. He gives an example of a bird flying into a window. After the bird hits the window it it stunned, and then it will suddenly flap its wings and move a bunch. After that movement it had 'released' the shock of running into the window, and can fly away. If you pick up the bird before it can shake, it will not be able to recover.
In other words, it is normal to hold the trauma, but we need to let ourselves release it in some way.
One exercise that is suggested (that I do off and on), is to take time in the shower to pat each body part, and just 'notice' how it feels. No judgement, just notice it. Change the water pressure or temp, and repeat.
You are not stupid, or a scaredy cat, from what I know you are experiencing something that is normal for people who have experienced trauma.
Listen to your body, it is powerful and beautiful, and if it is trying to tell you something, then honor it.
Do you have a T you can talk to about this?
Be kind and gentle to yourself.
Many