Hi, My Name Is Jetmir And I Am An 18

Hi, my name is Jetmir and I am an 18 year old student. I believe I have a kidney problem but I don't know how to solve it. Two years ago, while playing football (soccer), I started to feel pain in my right side of the back of the abdomen (where my right kidney is). At first, I ignored it thinking it had to be something related to muscles but this kept on repeating more and more often and everytime the pain lasted longer. The pain didn't spread to other areas of the body. Also, it can also be triggered by running, aerobic exercises and lifting heavy things. The pain can last from 10 minutes to 1 hour, depending on when I stop that activity and if I stay still while it lasts. I noticed that it lasts longer the more I move. Alongside the pain, before the pain starts, I feel like I am going to throw up and sometimes I even do. Sometimes I even have a headache and I am usually breathless by the end of the activity and when the pain starts. I have gone to many doctors in my country but none could help me. One of them said that I have kidney stones (very tiny) and gave me medicine to solve the problem but it wouldn't. The last time this happened was a week ago when I made only two 70 meter sprints during a football game. I hope someone on the internet can help me.
I thank you beforehand