As someone who had stool issues running my health anxiety and life for a couple weeks, eventually leading to a needless abdominal ultrasound, I definitely feel you on this. In fact, just the past couple of days, I've had mucus issues with mine and that's got those same wheels starting to turn again. However, what's important to remember is that bodies are weird and anxiety only messes with them more. Stress screws with the stomach a ton, and that means it screws with the bowels. It's the classic health anxiety loop where a person notices a symptom, which leads to stress/anxiety, which leads to more symptoms, and it's endless.
As for this particular concern, my stool floats all the time. It's probably because of all the fat in my godawful fastfood-based diet of the past five years that I'm only now trying to fix. It's honestly really nothing to worry about. You're gonna be fine. What's important now is to try to stop focusing on it. Eventually I learned to just stop looking in the toilet for more than half a second because I knew no matter what it looked like, I'd spot something "weird" to worry about. The sooner you cut anxiety's cord, you can start healing.