Having been married nearly 14 years I'll just say ... RUN FOR YOUR LIFE
No, really, it's fine
However, I've been there with the dress thing. Oh my, yes. I searched 4 countries for a dress that I liked and that could be made to fit. I bought one in Kendal, my nearest town from where I grew up, in the end. I hated it. DON'T MAKE MY MISTAKE - look now and find one, so you don't buy one a week before the wedding like me (and we'd booked the church 14 months in advance!).
My wedding dress was made into a christening robe for my daughter. And I made sure I made the first scissor cut, I was so grateful to get rid of it.
So look now, don't panic you have plenty of time, and just try and enjoy