Help!!! Implantation questions, Help!

Katie

AF is due on the 19th, and I NEVER spot before my period.

This is the 3rd morning in a row I've woken up and had light, brownish pink spotting and discharge. All spotting has gone away by mid morning every day.

Thursday I wasn't cramping at all and felt amazing. Not even a little bloated.

Yesterday I felt good, just a tiny bit of cramping when I first woke up.

Today I woke up and I'm cramping pretty bad in my back and to my left side.

If you experienced implantation bleeding, what was it like for you? How long? Whatd you feel like? How long after did you get your bfp?