Cold feet on wedding day

It's not that I dont want to marry him. I will definitely marry him today. But, I keep over thinking everything. Anyone else feel like this the big day? Its both of our second marriages. I was so young the first time and now that I've been through it and I've been broken and know that a marriage CAN still end. Maybe I'm just hormonal because I'm pregnant lol. Anyways, words of advice or stories of your day would be great. :)