Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that blocked nose with a recent history of having
sinus infection or
sinusitis seems to be due to lingering infection only and as there seems that you have mucous accumulation in the nostrils that is leading to blocked nose..
At times if infection is severe you need a longer course of antibiotics along with decongestants and mucolytics..
You should consult your treating doctor again and get evaluated as taking Sudafed alone will give you temporary relief and a cur for infection is a must for permanent cure..
You can be advised another course of antibiotics, anti-inflammatory painkiller like Ibuprofen, decongestants like Pseudoephadrine, do saline
nasal irrigation, steam inhalation and use a humidifier in your room..
You can also be advised decongestant nasal sprays containing
Xylometazoline or
Oxymetazoline..
Avoid spicy and chilled foods..
Do warm compresses around nostrils..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.