I always regret taking breathing for granted when my nose is stuffed
That's an interesting thing to say.  Is your stuffed nose so severe that it is affecting your normal breathing?
Yes it is. This experience is really painful. Most of the time I feel good but not right now.
It's good that you realize how fortunate you are to have good health most of the time. Just be grateful for the good things in life, and hopefully you won't face anything more serious.
I won't inhale though my nose anymore today until it gets better for me.
If you are simply finding it uncomfortable to breathe through your nose, then you can inhale by mouth.  However, if this is a chronic problem, or it is especially painful, you should consult a doctor.  Respiratory infections can get quite bad if left untreated.