Pressure on one side of the nose 2 months post op
Best from the symptoms you are describing, the condition you are experiencing is most likely called Recumbency Rhinitis. This is caused by the congestion of the inferior turbinate of the side that you sleep on. This can be easily corrected by radio frequency or laser tissue reduction on the turbinate.
Probably turbinate issues
I am sorry that you are having breathing issues. Sometimes after a septum has been crooked for a long time the turbinate on the open side grows. When the septum is corrected then the larger turbinate blocks one side. Sometimes intranasal steroids help and sometimes a secondary turbinectomy in necessary ot open the blocked side. The septum could also still be crooked. You should check again with your ENT for solutions. There are many different specialists, always consult with a board certified ENT surgeon. Internet conversations do not replace proper consultation with you doctor and examination.