I understand your feelings of being concerned and uncomfortable. I have not been doing wedding cakes for long and I learn something new everytime! I think the hardest for me was confidence. Now I work for a grocery store and am considered a "wreckerator" by some. I try my best with every cake I make. Sure I have had some wonderful wrecks! If we didnt have wrecks, it would be a boring proffesion!
Always remember that 75-90% of cake decorating is covering up "mistakes".
and MOST of allIf the bride was not happy with her $75.00 cake ( that is beautiful by the way!) she would not be happy with a 750.00 cake either. Pick up your chin, smile and move on to the next cake! KNow there are many of us just like you too!