help please?

Freda
Friday 2/24 I went to the restroom and there was bright red blood when I peed in the toilet (Af wasn't suppose to come until the next day 2/25).. I didn't stick a tampon in, a few hours go by and I go back to the bathroom and there was a very light color blood on the toilet paper when I whipped and it wasn't hardly nothing at all but there was also none in the toilet this time, so I decided to go ahead a stick a tampon in, two hours later I go to the bathroom my tampons dry no blood of any sort, I stuck another tampon in around 10:00 pm and go to bed I woke up at 2:30 am, went to the bathroom, took the tampon out and no blood. Yesterday 2/25 was when AF was suppose to be here. I have not used any tampons and I've saw no site of blood as of Friday 2/24. It's now Sunday 2/26 and slight cramps, but no blood.  Why could this be happening or what could that be indicating?