mycoplasma pneumonia
"Was meant to be on penicillin but the hospital changed my antibiotic 5 mins before I left because they found mycoplasma in my throat (they didn't really know what was wrong with me tbh). My symptoms are spot on to  a so I'm leaning towards that as what I have (its certainly not tonsilitis or 'stress' which they tried to fob me off with). I have taken 4 of these clarithromycin and I think they may be the devil in pill form. I have had nothing but shortness of breath, stomach cramps, vomiting and diarrhoea since. Apparently they are common side effects, but this seems ridiculous. I felt better of with just the pneumonia than with being on these!"