Panic attacks and fears

Hi :)
Ok so I have an extreme fear of 8 legged creepy crawlies.. Yesterday afternoon there was a huge one right above my partners head where he was cooking.. He killed it.. About 10 minutes after, I suffered what I can only describe as a panic attack.. I've never had one but had all the symptoms.
I continuously burst into tears last night as I couldn't get it out of my head. I cried myself to sleep and still, can't shake the uneasy feeling. Has anyone had a fear like this and know how to overcome it? Or have you suffered from panic attacks and have any advice? TIA x