Although it may seem costly and embarrassing to call off a wedding, it's even more costly and humiliating to go through a divorce. I was unsure before my first wedding but I was afraid that calling it off would upset my parents since they spent a lot of money. Two years after the wedding my divorce was final. I've now been happily married to my second husband for 12 years?I didn't have cold feet with him.
I would take a careful look at your relationship. It is normal to have doubts before a wedding, but it could also mean that something is wrong in your relationship. Talk to your fiance, they may be feeling similar things. Also, have you had marriage counseling? I would never recommend marriage before getting counseling. Best of luck!
Make sure this is really what you want, don't just get married because you feel obligated to do so, Marriage is a commitment not a requirement. and make sure he feels the same way for you. The support and love of one another should be equal. Best of luck to you.