I have been feeling off the entire day but I could not put a finger on it until I had the worst anxiety attack up to date. Out of nowhere I got major goosebumps, I felt hot and cold and I just dissociated, I could not breathe, my usual grounding things did not even work this time. 

I rarely get panic/anxiety attacks anymore, its been months since the last one so this one caught me by suprise.  Im even starting to feel another one coming and I do not know what to do. I took my atarax and im prepared to take more if its needed.

But THIS scared me, it came so sudden and left so fast. 
Is this even normal? Has anyone else experienced this?