Yes, I Am 19 Years Of Age. I Got My

Yes, I am 19 years of age. I got my menstrual cycle when I was 11. Since then my periods have been normal. I stay on for 3-5 days no more than 4. I am a Type 1 Diabetic, taking insulin shots. This month I got my cycle last Tuesday and went off Saturday. But Saturday night I was cramping real bad and noticed spotting. Light spotting. Since that night I've been spotting and having cramps as if I'm still on my cycle. Today is the 9th day and I'm still on. This isn't normal for me because I've never stayed on past 4 days. I'm scared can you help me