Hi I need some advice, so around 5 years ago I was doing loads of MDMA &amp; Pills and this lead these horrible, never ending headrush, dizziness, impending doom episodes where I’m certain I’m going to collapse unless I keep moving around and walking which would last up to an hour at a time. 
Now I’m sober, yet sometimes if anything enters my body, these episodes can reoccur. Such as caffeine intake. On my first covid vaccination shortly after I experienced the same thing(I’m guessing my body recognising a foreign substance entering my body) and it is the worst feeling in the world. Is this an anxiety attack? Doing my own research shows different symptoms of a panic attack to my own. Any advice or knowledge is greatly appreciated.