Dipstick urine test shows trace blood. When I test first thing in the morning results are always negative but they are positive throughout the day.

See a urologist. microscopic hematuria may be related to many issues: infection of the kidneys, bladder or urethra, urethral sticture or inflammation, bladder polyps, urethral diverticula aggressive intercourse etc. You should send urine of analysis and bacterial culture,