String of film in urine

My urine has a slightly viscous white film in it that looks a bit like a string coming out. I finally peed in a jar and the white stuff sinks slowly to the bottom. When I emptied out the urine from the top of the jar, I could touch the string of matter and it was slightly sticky. It was still pretty mixed with urine but coherent enough to tell it was sticky.

Anyone know what this might be?