Prob TMI?! Any help appreciated

Hi all I would be 4days late for AF. Been cramping really bad so much worse than usual. 
Thought I came on this morning (first wee) seemed like regular start to AF  used tampon, not a lot when removed a few hours later so put on a pad to monitor the situation!
  Been checking this afternoon and nothing on pad at all only pale pinky when I wipe? Is this still classed as AF or? I'm so confused my cycles are usually so regular :( please can anyone offer any kinda help as to why/what is happening?! 
Anyone experienced this?