Period Issues

This is an extremely odd question but I don't know if I should be concerned. The first two days of my period were normal, day three was heavy and then the past two days it's been really light. I'm not worried about that. But during these two light days, there's not much blood absorbed, but each tampon is full and it seems to be urine or another light colored fluid. It also sort of burns to take the tampons out. I don't wait long durations between using the restroom. There's red while using the restroom and while trying to use a liner, it was like abnormal period. I don't know what's going on and any info could really help!