I hope things work out for the best for you. Sometimes it is just a bad match and it is always best to discover this before the wedding. Other times, though, it is the added stress of the wedding, fear of the unknown, and a host of other things. My husband and I had a pretty bad time about 6 months prior to our wedding, but we worked everything out after a few months and have been married forever now. Okay not forever, but 10 years.
Good luck.