Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that you have lingering symptoms of
sinusitis and the symptoms and fatigue are also due to it..
I would suggest you to consult an Otolaryngologist and get evaluated and a thorough clinical evaluation and investigations like PNS View x ray can help in diagnosis and treatment can be done accordingly..
You can be advised to take another course of antibiotics like
Amoxicillin, anti-inflammatory painkiller like
Ibuprofen, decongestants like Pseudoephadrine..
Saline
nasal irrigation, steam inhalations and using a humidifier in your room will help..
You can also be advised steroid nasal sprays..
Take
multivitamin supplements to improve the nutrition level of body..
Chew a Vitamin C pellet to boost immunity..
Take sufficient rest..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.