Please help. Tmi picture!!

My period was due yesterday but came today. In the picture below is how it's looked all day. It's usually light but never this light. It is also kind of thin. I had sex during a couple fertile days using pull out method. When I wipe I have this kind of blood there is a bit in the bad but not really a lot. I'm not quite sure what to make of this. Perhaps just an off period?