What's wrong?

So about a month and a week ago I got my period and it lasted for about 10 days (when it usually only lasts for 4-5 days). About a week and a half after it ended I started spotting but it was pink and then brown a couple of time and I haven't gotten my period since (I was supposed to get about a week or two ago). I get cramping but nothing comes. Is my period just off?