I keep getting attacks, I sweat and get hot, then I start the cold chills?

I keep getting these attacks where under my chest where ribs meet in the middle suddenly starts hurting. Feels like a heavy sac. The first one I felt like I was going to die. Then the sec. I felt the same but knew I made it through the first one. They all start out with sudden stomach pain, then I sweat and get hot so much I want to strip my clothes off but can’t cause of pain then I feel nauseous and then after about 15-30 mins. pain stops and then I start the cold chills. It always feels like I been through trauma. I had about 6 attacks this year. All happen in the evening except the last one. The last was 1 week from the last attack and was in the morning after drinking a slim fast. It was just uncontrollable shaking and then my nose started to run. Lasted 5 mins. Major headache for 3 days and nauseous with fever. That could be unrelated. Sometimes feel bloated. Use Excedrin everyday for headaches.sometimes during running and attacks also have pain in right collarbone. Grandma has heart disease. I’ve searched heart attack verses gas and gallbladder. Can’t figure out what it is. I’m a 40 yr old female. Sometimes have tightening in chest in morning through afternoon.feels like it will shatter if I go beyond a certain movement. I don’t know where to start to get answers.