Quick Question about symptoms

So this past week I got AF, but it lasted two days longer than normal. I've never had it last more than 5 days, but I am also experiencing heightene sense of smell, major backaches, headaches, and heavy appetite. I haven't had sex in two weeks, but I have also never experienced these symptoms after my period. Is there any explanation to this because My AF was like it always was, except the two extra days. Help?!