I had my period 2 weeks ago. Now I have it again but its brown is this normal?

In the teen years anything is possible when it comes to periods. Brown blood usually indicates old blood, blood that just didn't leave your system for some reason. Now, having said that, it could also indicate an infection. Are you having any pain, trouble peeing, itchiness in your private area? If not, I'd chalk it up to a weird mid cycle spotting type of blood.

If you're really worried, a trip to the doctor is never a bad idea.