My 5 year old sister has had stomach ache for 5 days but today started with really bad D my mum said its defo a bug and it's really acute D I'm so scared I can't cope please help! What if it's already in my system but I havent staryes with it yet?! I'm going to my bfs house for the week now coz I can't be here but I'm so scared I'll come down with it there! Please please please help me I want to die!!!!!