Thanks for your question on Health Care Magic.
I can understand your situation and problem.
No need to worry much for this symptom ad possibility of
nasal obstruction due today secretions is more.
But better to consult ENT doctor and get done clinical examination of your nose and throat to rule out obstructive pathology.
If this is normal then no need to worry for this.
If you are
obese and smoker than possibility of
obstructive sleep apnea (OSA) is there.
In this you need to get done sleep study for the diagnosis of OSA.
You should avoid
smoking if you are smoker. Also loose weight if you are obese.
So consult ENT doctor and discuss all these.
Hope I have solved your query.
I will be happy to help you further.
Wish you good health. Thanks.