2 week period?

Angelia
So my period just ended and I bled for about 2 weeks and that was after it was about 4 or 5 days late. I got off my pill cycle and so it started while I was on the regular pills instead of the sugar ones. My period was normal for like the first week and then it got darker and the consistency wasn't the same. I'm a little worried. My friend said something like this happened to her friend and she had had a 2wk pregnancy and then a miscarriage. What should I do? 😕