extreme cramping

I'm 16 and about a year ago is when I noticed that my cramping was getting progressively worse and worse. It was irregular sometimes , but now for the most part I'm regular. I've used plan B like three times (never closer than 5 months apart for those times I have) it's gotten so bad to the point that I'm scared to get my period to the point where I don't even think I can handle another month of it. I get my period for 7 days and the first day is actually a nightmare. I get hot and cold flashes I sweat , sometimes when it does contract there's a sharp pain and when that happens I feel everything in my stomach go up and I wind up throwing up any pill I had just taken sometimes the heating pad doesn't even work. I've tried working out more getting a better diet, tea. Nothing really helps for the first day at least. Finally my mom said she would be making an appointment for the gyno for me but because she has work I might have to go alone. I'm sort of scared of what might be wrong with me if there is anything wrong. I'm pretty sure fibroids run in my family. And I'm not sure what to expect or how things will be when I'm there. Does anyone have advice to help cool my anxiety ?