It sounds like you might be dealing with nasal allergies, also known as allergic rhinitis. For many people the symptoms of allergic rhinitis are very pronounced in the mornings, especially if the allergy which is provoking the symptoms is something they are more exposed to at night - such as mites in the mattress or molding the bedroom carpet.
I suggest that you start by going to see your primary care doctor
for a quick checkup. They will be able to confirm that the sneezing and other symptoms you have are from allergies and not from some other cause. Once you have a diagnosis, they will be able to help you decide which treatments are best for you.
The Nettipot and other saline rinsing systems are one home method for treating sinus problems
and nasal allergies which can be very effective by reducing inflammation and washing out the provoking allergens.
In addition to these, there are good anti histamine medications, such as Claritin (loratidine) or Zyrtec (cetirizine), and prescription strength nasal steroid sprays, such as Fluticasone (flonase) and Nasonex (mometasone). Often a combination of these approaches is actually the most effective, and your primary care doctor will be able to help you make a decision. I recommend scheduling an appointment soon.