I went 5 months without a period, but finally got one and it was pretty normal.

But then two weeks later, it was like i had another period, but it was a brown discharge instead of blood and it doesnt really have an odor to it. I thought maybe it was because i went so long without a period, but i had already had a normal period. Well, its two weeks later, after that, and its the same thing again. Any clue on what it could be, and if its serious or not?