I have been waking up with nasal congestion for quite some time now. It's always in the morning. I'm just wondering if this is allergy related?
I am not a doctor and can't diagnose you, but I think Mike is one the right track. I've had a lot of problems with dust mites in my own life, and it sounds similar to my symptoms. Of course, it could be other elements of your sleepign environment or even foods you regularly eat before bed. I would suggest you see a physician and get tested for a panel of allergies and see what you learn.
Best of lcuk!
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Have yourself tested for dust mite allergies. Your symptoms are classic mite allergy. The good news if you test positive the solution is fairly simple.