I had my period this month but when I went pee I noticed some redish or brownish spots when I peed but not on my underwear on the toile. What is that?

Spotting. Brownish spots could be a sign of a urinary tract infection or stone. The spotting sounds like it is coming from your urine and not vagina. If it persists a urine culture should be gotten and possibly an ultrasound of the kidneys or Xray to rule out stones. If it persists see your doctor.