Me and my friends all started of with brown period. It will change later, in fact i find brown period much more pleasant than the red ones. Feeling ill and having stomach aches are totally normal when you get period, there are much more symptoms such as mood swing, eating a lot and more. Here's a small advice- Exercising can delay your period! And keep a lot of pads and odor remover for period.
Hello You may want to see your doctor but period color can change and start a different color