Little concerned, opinions are welcome!

After discussing my period with a close friend, it has been brought to my attention that I should be a little concerned. I'm late by over a week for my current period. My last period was super freaky, I bled for probably a good two weeks after I was supposed to stop. However, it wasn't enough to be considered another period, more like pinkish discharge. Just looking for  some opinions on what I should do or if anyone has an idea what it could be.