Eskimocel said:
How? Damn dude I wish I could breathe through my nose as easier as breathing with your mouth. I feel like I cannot fill my lungs and always short of breath whenever I breathe through my nose.
The transitioning period might be uncomfortable/mildly painful, you may experience lack of breath, not getting a sufficient intake of air to fill your lungs.
But if you persist, your airways will readjust and open up and in about 2-3 weeks you will be able to nose breathe.
An important key part of this, is trying to keep your tongue at the top of your pallet(roof of the mouth)(so that your jaw muscles can readjust and open up your airways)
You will need to put a lot of conscious effort into nose breathing and keeping your tongue at the roof of your mouth, but with time it will become easier. The key is persevering until it requires much less conscious effort.