I have had three periods in less than two months. One of them the blood was orange, what's going on?

See doctor. A certain amount of menstrual irregularity is common the first year or two, but if you've been menstruating more than 1-2 years, this has to be considered abnormal vaginal bleeding. Any abnormal bleeding needs professional evaluation. There are many possible causes, but abnormal color could indicate infection, such as an STD like gonorrhea or chlamydia. See a doctor soon. Good luck!