HELP!!!

Dee

I'm kind of sort of freaking out!! My period is always on time and it always lasts 4 to 5 days and this month I thought I got my period like normal and my period only lasted 2 days and it was light. Should I be worryed. I dont have any symptoms of be pregnant, but im still unsure whats going on with my body. I took a test and it came back negative.