Concerned 😓

Lesly
So I got my Mirena inserted on 5-12-2017 so recently and I had it put in on my third day of my menstrual cycle and it ended the the 14th. But on the 16th I started cramping  and the next day after I was bleeding but it was a dark brown and today it's more of a red like a regular period. Its not heavy and im not feeling any pain. I just wanted to know if it's normal??Â