Recently diagnosed with bladder cancer

I was recently diagnosed with bladder cancer.  It came as a huge shock as I had no symptoms other than a UTI which recurred and eventually showed a lot of blood in urine.  The doctors  have recommended chemotherapy, which will start soon.  I have good support at home and from family and friends but it’s so hard to be positive sometimes especially when I feel the opposite way. I’m not the only one who feels like this?