I can't sneeze i, get up to ahh and then rhe rest wont come out? No cold no stuffy nose? Happend 4 times today...Why is this?

1 of those things. This is just one of those frustrating things. Our bodies are not always cooperative. You may try rinsing your nose with saline rinse; perhaps that will clear whatever is tickling your nose.
Congestion of nose. You have nasal congestion which can occur due to viral infections or 'cold', allergies, change in the weather etc.