Leaving My Baby for the First Time

I am only a couple of weeks away from having to leave my baby with someone other than her father for the first time. My sister is getting married, I am the matron of honor and my husband is the Master of Ceremonies which is going to leave little time for parenting. We are planning on bringing Lilah to the ceremony, but just before the dinner starts my husband is going to be taking her to her grandparent's place for the rest of the night.

I completely trust that her grandparents will take excellent care of her (after all, they did successfully raise 6 babies of their own, my husband included), but despite this, I am having a lot of trouble with the idea. Is this a struggle that every new parent goes through?

I don't know that I would be so stressed out about it if it was only going to be for a couple of hours during the day, but bedtime is a complete different story. For 5 months now, she has been getting used to our bedtime routine. I always feed her in the same place, sing her the same songs and put her down the same way. I keep wondering, is she going to fall asleep after being fed from a bottle by someone other than her father (which has also never happened before)? Will she fall asleep without her songs and in a strange place? All of these questions are floating around in my head and causing me to loose sleep.

I know that in the end, everything is going to be just fine. This is most likely going to be much harder on me than it will be on her. I expect that she will take a bottle from her Papa just fine and that she will fall soundly asleep in her playpen as if it were any other night. When she wakes up for her first night-feeding, her daddy will be there to give her a bottle and for subsequent feedings, I will be there to nurse her.

I am sure that after we have done this once, it will get easier. I don't fault myself for wanting to be there to take care of my baby and I expect that all of this is a perfectly normal stage that all loving, attached parents go through. I just wish the rational part of my brain would communicate all of this to the worry-wart mother part of my brain so I could stop stressing out about it so much!