How do I know if I've been floxxed?

My doctor prescribed me a 5 day course of Cipro because he suspected I had a stomach infection. I took a 500mg dose yesterday before I read about all the dangers and today I feel very off. My left arm is very sore and my left leg keeps twitching and I have veryyy bad fatigue. I already have Long Covid so I deal with fatigue on the daily but today it's been extra bad along with my brain fog being 10x worse. My heart also feels weak? I stopped taking it immediately after that and booked another appointment with my doctor. I just wanted to ask if it's possible to get floxxed with 1 dose?