Lots of pain

Okay so I’m 14 and my first day of my period is horrible. I feel like I’m dying. I can’t move or breathe and I have such tight cramps that don’t seem to go away. I hate my period more then anything and I’ve had it for around 2 years and I have always been heavy and so sick like this. It’s mostly only on the first day the other days are fine but I don’t know what to do. Any advice?