I'm 18years old, I'm a soccer player. And recently ive been having trouble breathing. I've been having trouble with taking short breaths. I continue to take deep breaths and I can't help it. I get upper back pains when I breath in deeply. Every 15- 30 seconds I take a deep breath. I get super light headed while I'm just sitting down, it's only a problem when I'm relaxing or not doing much activity. I feel fine when I work out and go on runs. I don't know what's wrong with me.