Am i having a panic attack???

i have a deathly fear of spiders. even the little ones. and i was washing my hands in the bathroom and i saw a spider crawling up my arm that was almost the size of a tarantula. IM NOT OVER EXAGGERATING!!!!!!!! i screamed and started slapping myself everywhere and rubbing my arms until they were red. after that- i ran out and sat down bawling and i felt like i couldnt move. i emmediately started shaking very hard. i began to hypervenelate (idk how to spell it) and my heart wouldnt stop beating super fast. its been about 10 minutes since and im still crying and im having terrible troubles breathing. it almost feel like my throat is closing. I CANT STOP CRYING!!!!!! im having flashbacks of seeing the spider crawling up my arms and it makes me start all over. please dont tell me im being over dramatic about a spider because u dont know how scared of them i am! plz tell me whats happening???????? am i having a panic attack cuz i cant stop shaking, crying, fidgeting, and having troubles breathing. HELP!