My 21 year old son is having sharp pain in right side below rib cage, including pain there when deep breathing. Feels as if he is overexerted himself - went to ER for anxiety attack on 3/15- did chest xray and EKG at time- all good. Went to walk in clinic yesterday and was told he possibly pulled muscle from vomiting over weekend (little too much celebrating his 21st birthday) - fatigue, night sweats, distended tummy and bloated. Had showed a 4 pound weight gain within week - and he's not doing anything out of the ordinary.