Welcome to the forum. It is nice to know that you have partially recovered from your illness. To get rid of congestion, you need mucolytics that can loosen the thickened mucous and phlegm ( dry cough
and congestion) and help to bring them up from the airways. Bromophiniramine can be of help. Alert your treating doctor if you are allergic to the mentioned medications.
Take soups and warm meals to feel better. Steam inhalation for 15-20 minutes twice a day regularly for 20-25 days will cure you naturally. Nasal saline wash under an expert in also helpful.
Stay away from pollution, pollen or anything that may trigger your symptoms. Try to sleep well and perform yoga
under an expert to be able to breath well and get rid of congestion.
Have a nice day, take care.