No marriage is perfect
Even the most compitable couple disagree. Marital disagreements are not a sign of a troubled marriage. It just means that your marriage is made up of two normal and healthy minds. While disagreements are inevitable, arguments can be minimized or avoided. The key is to established rules of conflict resolution before conflict arise and agreeing to give each other room to freely express feelings and frastrations before they they build up into stressors. Ideally you should sit down and calmly discuss matters.