Why Had Spotting Followed By Irregular Flow, Mild Cramping And A Long Period?

Hello. I'm 26 years old, not on birth control, and have been having the weirdest period. For the first four days it was just spotting, then it came to a normal flow, and then went somewhat light again. And know it's on the tenth day and it has already went to Brown now back to red, and is light. I'm really concerned because my periods are only 5-6 days long This is normal for me but because it is light with mild cramping.. should I be worried and go to the hospital? Please help