Spotting after period!

After my period, like three days after it ends I'm having spotting like a brown discharge the days after, sometimes 4 or five days then, I have clear discharge and everything goes back to normal. This is happening almost one year ago... I already went to the doctor but can't really say what's happening. I already had check my ovaries but seems nothing wrong. Does anyone have the same thing?! Or had and can tell me?