I Had To Urinate And Waited Because I Was In

I had to urinate and waited because I was in a important conversation. When I went It was blood tinged a bit darker than pink.
I just went again about an hour later an there are a few small clots. I feel fine no fever. I do feel at the end of urination a burn pain.
I have had a bladder sling about 7 years ago with no problems.