I have recently come back from a 10 day trip in Kenya. Whilst I was there I felt fine though on returning home I have become to feel extremely tired, sick, headaches, weak. Whilst I was there I hit my head pretty hard and think I got a concussion but didn't go to a doctors. Do you think this could just be a side effect of the concussion of something else? I have taken my malerone tablets daily and haven't had any ill effects. Do I need to go to the doctors? thanks x