please help!

So so so confused. My periods are normally 35 day cylce, 6 day period. I just had a 25 day cycle and am going on day number 9 of my period!!! And before this one my clue was 65 days and 3 day period?! This period is just brown blood with just a bit of red, super light, like not even enough to put a tampon in but like wth?! What's going on?!