Green tea causing stomach problems?

Rachel
Hey ladies I just started drinking 2-3 cups of green herbal tea a day. My question is can this cause me to have stomach pains?? For the past 3 days I haven't been able to eat much. Day one I got sick twice and could only eat a few crackers. Day two I ate some soup and lightly salted fries. Day three I thought I was better so I ate some pasta and ice cream. Later that day my stomach was very sore, like someone had punched me and throughout the night I couldn't lay a certain way because it hurt my stomach. I'm on my period btw.