hi there, what you have described seems like an acute follicular pharyngitis
, usually caused due to strptococcal infection. You need to visit your local GP and get a prescription for an antibiotic and some anti inflammatory pills. He might also require you to get a throat swab culture done.You should complete the course of antibiotics . In the meanwhile you could try doing warm saline gargles and a painkiller to relieve you of the pain. Do get started on antibiotics as untreated this infection could be dangerous. Take care.