Hello I am 25 years old male. For 3 months i followed a treatment with BENZATHINI BENZYLPENICILLINUM with injections for throat infection. While doing the injections i started having stomache pain and after some time diareea. It persistes a long time and i went to the doctor who told me to stop the treatment for the infection ( i had only 2 more injections) and gave me pills for diareea and stomache for 30 days treatment and also a diet. Things started getting better. No more diareea for the past 2 weeks and a half, only stomache pain from time to time, sometimes when i eat, sometimes after, randomly. At the hospital they did stomache ecography and blood analysis and said that i am ok. When the doctor palpates me on my belly it hurts. Anyway, the problem is that i still have this stomache acke and today after basketball i had diareea. So when i do intensive physical effort i have diareea. For the past 2 weeks i stopped the effort, but now again diareea. What should i do? Is this normal?