Dave
after your previous experience at the hospital I understand your reluctance to have to go back.
If you are having times when you just can't go, weak flow and blood in your urine which is sometimes clotted you definitely have a problem that needs checking out.
I am not a medically qualified person so would not presume to try and give an opinion on how urgent or not that might be, however even though a urine infection has been ruled out that still leaves several other possibilities.
These include urine retention in the bladder (even partial) a partial blockage or restriction somewhere in your waterworks or a possible problem elsewhere in the general local including in the prostate itself. It is quite common for the urethra to become squeezed in PCa, that can sometimes be eased by medication although it can also ultimately require surgical intervention like a TURP.
Things to consider are When you do manage to go is the urine dark and strong smelling or just normal?
Do you feel lke you really need to go but just cannot? Are you getting constant or increasing pain?
Are you still drinking plenty of fluids (water in paticularly) etc.
If you are in no pain and actually outputting a reasonable amount of urine in small but frequent wees and feel ok in yourself then it may be OK to wait until you see the consultant next week. If you start to get sweaty, have any significant pain or more persistent bleeding or find that you cannot urinate within a maximum 12 hour period then do not let previous issues deter you, get into A&E and get it checked out. If you do not empty your bladder sufficiently and urine starts to backflow back up to your kidneys that can be very serious indeed.
If you feel you are genuinely ok to wait and see the consultant then make sure you let them know every little detail.
I wish you all the best
xx
Mo