Help tired all the time?

Hello all. Firstly long story short. Recently I saw a Dr and he told me to self catheter which I have been. Now hes told me to stop. Fair enough When I last saw him he told me my floods are fine. I had the tests done as I was getting tired. Now I just got out of hospital. Today. As the nurses have put in a catheter which 24/ 7 and I cant take it out. Anyway. Wheb I had cancer 2009. I had chemo 2010. And I was tired all the time But my chemo finished what 8 months ago. And these days I am still getting tired in the day. Now my bloods are fine Now I am really feeling drained. And tired. And also which is expect plain down below Spoke to Dr and he is confused. Btw with thus catheter in. I am still wetting at night. Again help Plus before I was doing the catheter my self. I stopped drinking at night. I get up in morning and I am wet soaked through. So I brought nappies its still happening Can anyone help or give me advise please. If u want to know more please inbox me