IMO, weddings are something that are definitely a stretch for some people...i'm still trying to get used to them after shooting a dozen or so, but so far it's been a fun ride. If you continue to do them, or decide to study under someone or shoot as a second shooter (both are good ideas), try to relax and have fun with it. You'll have a few bad apples. Everyone does. But then you'll have a WONDERFUL wedding with very friendly clients and you'll like it all over again. If you do another one soon, strive for a slow, relaxed process and preparation. Plan out a schedule for the day with the bride (and perhaps her mother), and tell them to be ready for certain events earlier than you really think they need to. Arrive early, take test shots before they get there, just do whatever you can to take the stress off. It helps.
and if you're stuck in a situation where you were forced out of an opportunity, don't be hard on yourself. I've been in situations where I absolutely HAD to compromise on some shots (couldn't take the bridal party shots outdoor, for example), and while it was frustrating, I realized that there wasn't anything I could do about it and they wouldn't be disappointed with me as their photographer for not getting that.
I hope that helps ya
oh and what's this about photographers stopping at the bar at the reception? that's way out of line IMO. While it's important to relax, I think photographers might not take their 'duty' seriously enough (and clients too, with their photographers).