I'm having severe stomach pains in like my upper stomach and a little further down on the right. The pain is so bad it's in my chest as well and it hurts in breathe. I'm crying and my mum gave me an antacid but it's hurting so bad just to sit on a chair. I'm supposed to get my period in like a day according to this app, but I've never had pain like this. Has anyone else had this and can tell me what it is????