Has anyone experienced hematuria or slight bleeding after urinating when taking Oxycontin?

I was wondering if anyone else or anyone know what the chances are of experiencing some very light bleeding from urethra when taking Oxycontin/Oxycodone? Since I have started it, I have had about 2 to 3 times a week some pale pink blood on tissue after I urinate. I have had urinalysis and all came back negative on culture for any bacteria. Thank you!

: http://alcoholdrugstreatment.info/has-anyone-experienced-hematuria-or-slight-bleeding-after-urinating-when-taking-oxycontin