Sounds as if you are bouncing back just fine so far!! The fact that you are able to post here and are walking every day are great signs.
As for leakage with the catheter in, I experienced the same thing....for all 22 days it was in....not fun. Docs said it was probably due to bladder spasms, but whatever it was, it did not help things. I wore pads to catch the leakage. Also used KY jelly on head of penis to keep it from becoming raw.....and Boudreaux's Butt Paste on my scrotum to prevent diaper rash.
Keep walking, drinking that water and before you know it you will start feeling stronger physically and mentally.