Tmc84,
Welcome. Slow down the mind but, do exactly what your plan is; see the doctor.
The majority of these hematuria episodes are NOT bladder cancer. Stones, UTI etc. Distance runners will often have this. There are people that they never even find a cause for this. I am guessing a cytology analyzing the urine will be the first step and if an infection is found it may simply be treated with antibiotics with a follow up. If no infection it is possible a cystoscope and/or a CT scan may be done but, your doc may have another idea after he asks questions on what is next. At that point I won't guess any further as it is simply a process ruling in or out things and none of us are doctors. Keep posting as you go and let's hope your answers are minor!