first time panic attack

by nabta

This happened to me about a week ago I was just laying in bed about to go to sleep when it hit me it started with my hands and feet getting really cold n then I could feel my heart racing like crazy I was terrified and thought that I was dying from a heart attack but I started breathing deeply n it eventually stopped the next I went to the doctor and all my tests were normal but after the attack I have lost my appetite completely I was tense and I couldn't relax or sleep at night for the next two days I was just really scared it will happen again, I'm still feeling not 100% myself yet because my appetite is still shut its been a week now since the attack but the anxiety has lessened somehow. Is the loss of appetite something I should worry about?