Dear friend. Thanks for sharing your concern. Swollen gums and glands indicate clearly towards infection.its nice that you have started antibiotics ,but it seems with your history that it is not responding to antibiotics. Based upon history given ,it could be due to deep periodontal pocket,or one or more abscessed teeth in the same arch. It requires immediate attention,clinical exploration along with x rays should help. If required,antibiotics can be changed based upon culture sensitivity test,as your present antibiotic is not responding well. Also please remember dental abscess once developed must be drained thoroughly under suitable antibiotic and analgesics coverage. Meanwhile you can continue warm saline rinses.especially after food,as it maintains good oral hygiene and visit your dentist soon. Hope it helps. Thanks. Take care.