Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain the symptoms of chemical smell in nose along with discomfort in sleeping on the right side seems to be most probably be due to prevailing
sinus infection that has no completely resolved and as the sinuses drains through the nose, it seems to be the cause..
I would suggest you to consult an Otolaryngologist and get evvaluated and he can do a thorough clinical evaluation and also advise you MRI or PNS View x ray of sinuses and confirm the cause..
In case if
sinusitis is confirmed you will have to take another course of antibiotics like
Augmentin, anti-inflammatory painkillers like Ibuprofen, decongestants like
Phenylephrine, steam inhalations, saline nasal irrigations, decongestant nasal sprays containing
Xylometazoline and steroid nasal sprays..
As of now you can do steam inhalations with a few drops of eucalyptus oil in boiling water for refreshing your breath..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..