Period blood or not???

So I'm on the last few days of my period so the bloods really light coloured, and when I went to the bathroom my stool was quite hard and i felt a sort of 'tear' when it passed. I've not really eaten a lot of fibre recently. There was no blood in the actual stool but when I wiped there was a pinky red stain on the paper. Is this my period, a fissure or cancer? I'm sorry I get really worked up with everything health- related so I'm kind of freaking out.