10 Days bleeding.

My period is ususally 4 days. 2 of them are heavy with clots, but im currently on the 10th day of my "period" this period i had no clots or heavy period its actually really light but still red. is this normal? this has never happen to me before. should i go to the doctor or is just a long period this month? PLEASE GIVE ME YOUR FEEDBACK. IDK WHAT TO DO. :'(