Thanks this really helped!:)
Hello and hope you are doing well.
Your symptoms could most probably be due tonsillitis and a throat infection. Throat pain, difficulty swallowing, fever, scratchiness in the throat, post nasal drip, malaise and loss of appetite are symptoms of tonsillitis. It can be caused by bacteria like streptococcus or it could be a viral infection. Bacterial infections need antibiotics. Consult your primary care physician who will do blood tests and take a throat swab to determine the cause and prescribe appropriate medications.
Hope this helped and do keep us posted.