Hi
@CosmicJuiceBoxx - the short answer is blood in the urine is never normal but can be caused by lots of benign issues that will not be disconcerting to very serious issues docs will of course explain.
The answer I would go with is call the doctor's office or hospital and tell them what is going on and ask if this is normal. There are lots of possibilities - if you had scar tissue and it was blocking where the catheter went and it nicked it, it would cause bleeding until it healed but I am guessing. I assumed they also removed some of the scar tissue but I don't think you said.
Regardless, blood, lumps, severely discoloured urine - like whisky or stool (white can be disconcerting and should be investigated) - talk to a doctor or their office and they may tell you it is expected with the the findings.
If it was me in the short term to facilitate healing I would ensure I was taking 1500 mg of Astragalus twice a day and 1200 mg of NAC twice a day just in case this caused additional stress on your kidneys.
I'm not doctor but one important factor is how do you feel? Do you feel different than before or is it just the blood that is disconcerting?
Just a FYI - I can work outside hard for 8 hours and forget to drink enough, come in the house and wonder why my head hurts and my urine is extremely dark. It is just concentrated but after a few glasses of water it is normal again. You know how people sit in saunas with a special covering to drop weight for fights. I do this by accident ( I think the most was 10 lbs in a day) - when I had to reinforce the base of my barn (not a full sized but about 3-4 times the size of a mini-barn). Jacked it up, reinforced the bottom as the contractors did a shit job, after I rebuild the ground up some so it was level and then dropped it back down. I had a bunch of concrete blocks and patio stones I used. It was hot as hell and bought crushed gravel, I would forget to drink as I wanted to get it done in one day and possibly move it over 10-12 feet and when I had a leak, I was amazed how discoloured it was. I dipped my urine with urinalysis strips and other than PH being off, everyhth0ing else fine.
Call the doc my friend as we are just guessing without reading the report on the procedure.