I suffer from panic attacks, made me agrophobic for years but now i know how to deal with them and it does not sound like a panic attack, a panic attack is basically what you have
you panic, feel extreme terror that soemthing awfuk is about to happen, with me i thought i was about to faint, have a fit or die! i would start shaking, sweating, fidgeting, i would without realising it hold my breath which made me feel dizzy, my throat would go dry and i could not swallow. i would go into flight/fight mode where i feel an extreme urge to escaoe and get out of whereever i was or situation by running etc.. you definitley would feel fear!
i think you should go to you gp and get checked out as your symptoms could be related to many things.
ps. one time i thought i was about to have a panic attack i had all the symptoms but not the fear exceopt of course oi thoughht i might faint, i found out later that day that i was pregnant so maybe you are?
x