I got married 2 1/2 years ago. My fiance and I opted to have a weekend wedding with just our immediate family and closest friends. We did this for many reasons- it was just more "us", more time with the people who mean the most to us, etc. But mainly because I was terrified of having a large (or even "regular-sized"!) wedding. I admire every single person on here who deals with anxiety/panic but was able to make it through their wedding day! I didn't even have the courage to try- don't get me wrong, I really wouldn't change a thing about my wedding, it is just sometimes sad always having to take anxiety into account.
My anxiety now has gotten worse for me and is pretty situational. For example, one of my best friends recently got engaged and asked me to be a bridesmaid. I told her that while I was honored, I just didn't think I could handle being in front of 300+ people.

My point here is, you will have a wonderful day and although I don't know you, I am so very proud of you because to me, someone who can conquer these fears/anxieties/panic attacks is equivilent to someone who climbs Mt Everest!

Good luck and let us know how great it all turns out.