Stomach problem. In google please!

On aug 18 when I am using some antibiotics from aug 16 for throat infection from aug 18 night I got loose motions and after that I went to ent hospital and after 2,3 days I said about my loose motions condition to the doctor she said to use bifilac i used before i udes to get loose motions mostly at night but after that it had become some better now I am getting stool daily 3-4 times not too loose or normal like middle some pain if I won't go to bathroom some noises in stomach I am afraid of what I am having and at night I won't sleep I will eat sugary foods after that it had increased now going 3-4 times bathroom some very low  fever and body pains which I won't have all the day please say what happened to me I am having a lot of tension if I am searching in Google please