What can i do to stop bad period stomach pain and pelvic pain?

Your body is talking to you! Listen & take good notes. When does it start/stop? Where does it go? What makes it better/worse? How long does it last? Medication helps/worsens? 
If you think it is something you eat/drink/do stop it & see. If better, go back again & retest until u r convinced it is something u should stop. Then stop it. Discuss with your Drs. You all will figure it out.

You can try ibuprofen. But if it is recurrent pl get checked out by your GYN