I am sorry (((icedgem))), I can experience this myself so I know what you are describing. What is happening is when dealing with too many things all at once, it can trigger the ptsd to get active where you experience that feeling of being overwhelmed which is what took place when you experienced a trauma where you developed ptsd. Sometimes our subconscious mind catastrophizes even when we simply do not want to experience this kind of challenge. You do have to talk yourself down and remind yourself that these things you are experiencing can get resolved and that you can work through this. The emotion is really more about fear that is bringing about more anxiety. People that struggle with ptsd don't like surprises, it can trigger them to struggle with anxiety that at times can get crippling.