What is going on?

My body is driving me 

crazy...I started 3 days late (got a very light positive-which I figured was Evap because I started)  and know I'm barely having a period. I started Tuesday and it was kinda a normal period; wore a pad all day wasn't really heavy..and had a few clots. well yesterday it was a lot lighter I wore a tampon and only changed once. I went to change it again and there was hardly anything on it. And I woke up with nothing on pad and just light spotting when I wipe. What is going on? Ugh!