Hi I experienced a reaction to penicillin to clear up tonsillitis a week ago, it caused servers stomoach pain when I ate or drank, now it's gone, but I feel breathless when I'm stood up or any kind of exercise, my rite ear drum is painful and my right side of my head is sensitive not a headache, also I woke up this morning with sensitive skin on my left side below my rib cage and at the bottom of the left side of my back, also I've not been able to eat a lot as my apatite has gone, I've also lost a stone in weight, could you try and explain to me what's going on please I am 22 years old and a male