Thank you for posting.
From your description if you are still presenting with sore throat
and body pains, it means the throat infection
is persisting and possibly the causative microorganism is resistant to acethramycine antibiotics or you have taken the antibiotics for a shorter period ( probably continuation will improve your condition). But first, I will suggest you pay a visit to your doctor. Normally he/she should run a throat swap + culture to find out the specific causative microorganism before he/she could decide on which antibiotics will be sensitive to your infection. You will have to continue the antiinflammatory/ibuprofen for a couple of days again to manage the body pains.
Flu syndrome caused by bacteria could always be complicated by pharyngitis
(like in your own situation) or other respiratory tract
infections like bronchitis, pneumonia etc. Identifying the germ now is important through the throat swab so as to avoid micro-bacterial antibiotic resistance
Hope this helps