Shelby,
miffed clients because they did not get it yesterday can be avoided by setting reasonable expectations in the first place. If they want you to perform towards a delivery deadline, there are two ways, you do it, and ad a premium, or you say you do not work this way and quality is your concern, not speed of delivery. I would think the latter is the better option, then again, I am no wedding chap.
I was asked the inevitable once, to shoot a silver wedding anniversary. I felt like a fool LOL.
Total strangers I never saw in my live were grinning into the lense as if they won the Lotto, or making dumb nut faces, expecting me to laugh?
Then of course, the inevitable phletora of people stuffing their faces.
No, I could not handle that, not even for money, and I refused being payed, and just gave them all photos for nothing, thanking them for the opportunity to learn a lesson. Never again will I do this for the rest of my life. - Lesson learned! -
As for your remarks on business, it might be wise to think about time-management, and invest into some external knowledge to be transfered to you in that respect. Just a loooong shot of course.... but I found in my time as a consultant that this is the most underestimated area where you can improve rapidly and make things easier on yourself.
Oh, btw, do refuse irish clients asking you to shoot their wedding at all costs. they will ask you to drink plenty of whiskey, and if you refuse you are in deep ****, but if accept and drink, you are in even deeper.