Lifting soft pallet too high.

For a good resonance, you need to create space in your throat and one of the action involves lifting the soft palate, right? So when I started practicing, I was able to lift the palate without any efforts. So, I kept practicing with that. Lately, I have realised that while singing, I don't get any air out of my nose at all except for the N, M and the similar sounds. For everything else, the nose it totally blocked by my soft palate. When I close my nose, it doesn't feel any different at all. Is this normal? Or should I lower the soft palate a bit and allow some air? I have started experimenting but I would like to have some guidance from the learned ones.