Honestly, I can definitely sympathize with you in difficult life transitions. I'm not getting married lol, but in less than a week I will be graduating from my two year community college and will be going to university in the fall. I'm also someone who struggles with anxiety and depression and I do take medications just to keep me on the right track. But I'm dealing with a whirlwind of feelings right now and am trying to be "brave." But I am getting so emotional about this last week that it's going to be hard. :p
Are you a religious person at all? When I get in a crazy funk like I am now, I go to a place where I will not be interrupted by people and have a talk with God. I rant and rave and cry and ask for signs and ask for strength...sometimes I'm at it for quite a while, but letting it all out without getting wishy-washy in front of people really helps. I'm one of those people that hates crying, and I'm not good with extreme emotions either.
Another thing that helps me immensely when I'm really emotional is going and riding my horse and focusing on it. I felt so rotten on Thursday, and after I had a lesson, even when my horse bucked and I almost went down, I felt SO much more content and happy despite all of my concerns.
And...just believe in yourself. It's something that's not easy, trust me, but it's something we have to do. I have stepped out of my comfort zone so many times in the last few months that it isn't even funny. I'm making decisions I didn't think I would make - not bad ones necessarily, just the ones that aren't always "safe." Personally, I think they'll come back to bite me in the butt, but I have no control of the future, and I'm tired of always playing it safe with my life and staying in my comfort zone. I know I sound pretty extreme, and trust me, what I have done would not be extreme in most people's eyes, but it's extreme for me.
Let the pieces fall where they may, and if it's meant to be it's meant to be. I have three songs that keep me going -- Carry On, Try, and Every Storm (Runs Out of Rain). They just remind me that even though things hurt and get scary, things will always get better and you will make it through.
In a matter of a few months, I will be moving out of home, living in a new place, having loads of independence, taking on a new workload at school, getting a new job, leaving friends and family behind, moving in with friends, and I'm pretty sure I made a choice that is going to leave me hurting, and I can no longer change that choice -- I just have to wait to take the fall. But...I'll get through it somehow. And so will you.
Again, can completely relate.