These symptoms suggest a throat infection with significant inflammation. For temporary relief, you can take over-the-counter pain relievers like ibuprofen or acetaminophen to reduce pain and swelling. An anesthetic throat spray or gel containing lidocaine or benzocaine can help soothe throat ulcers, especially before eating. Warm salt water gargles are also highly effective. However, because you are experiencing swelling and difficulty breathing while sleeping, it is crucial that you see a doctor immediately. This could indicate a severe infection, such as tonsillitis, which may require prescription antibiotics or further evaluation to ensure your airway remains safe. Please seek professional medical care promptly.