It is not that uncommon for couples to fight on their wedding day but every couple? No. The weeks leading up to the wedding are stressful for sure, and stressed people are more short-tempered, less tolerant, less measured. So there are likely to be more fights at this time than probably at any other time in your relationship. However, if you make sure these fights are handled properly, there is no reason why you should be hissing from the corner of your mouth on your wedding day when you should be eating cake.