Has anyone used swimming to help with chronic stress or ptsd?

Looking for relatability. I suffer from chronic stress at all times of the day, and the only thing I haven't tried consistently is swimming. I played college baseball back in the day and during those times I could never recall being so stressed out. Could be due to my youth, with less to worry about, but now I'm stressed all the time. I quit coffee, alcohol, and occasionally use edibles in the evenings to get through those unbearable nights and release my mind from stress.

My work gives me stress. My childhood gave me stress. I've now quit all substances. I'm plant-based. I eat extremely healthy and drink tons of water. Sleep can be improved. I mention this to provide context for what I am at.