I totally feel your pain...or nerves for that matter. I'm in the home stretch of things and will go to the NYC Consulate by the end of March (I'm applying for the Unmarried Partners Visa) to be reunited with my partner by the 2nd week of April. Although, I'm still a bit nervous about going to the consulate, my nerves have subsided a little since my phone call to the Home Office in Croydon last week. I gave them a run down of everything I had and they said I should be fine, but we'll just have to wait and see.
I find that when I calm down about one thing, I become paranoid about the next. My thing now is what if the NYC consulate does not think I'll have enough funds? My partner just got a new job this month after being unemployed in the UK for 2 months. The little savings that we had has been used up and my partner is just now getting back into the swing of things. To be on the safe side, I asked my parents to be my co-sponsor and they agreed. I wasn't going to go that route at first, but I figured it is better to safe than sorry.
Aside from that, now I'm getting to the point of where I'm asking myself "what am I going to do once I arrive in the UK?" I've never lived in another country before and up until now, I never felt nervous about relocating to the UK. I love the UK, so I don't understand where these nerves are coming from all of a sudden.
In the end, I'm sure everything will fall into place and everything will be fine with both yours and my situation. I guess if we weren't nervous, then something would be seriously wrong.