VERY long day

I've been doing babysitting lately for a friend of mine, once or twice a week depending on her week schedule. Usually her husband gets home by 1 or 1:30. Today he didn't get home until 2:30, and I think only because when I got there this morning I told her that I HAD to be home by 3:00. I had to bake potatoes for the RS birthday dinner tonight. My calling has to do with Enrichment. Livvy slept for a half hour this morning, which is normal. The little girl, Kaylee, was already asleep. She is 14 months old. Livvy was so tired I managed to get her to sleep again later, but Kaylee- being a normal toddler- woke her up. We got home about 2:30, and I thought that since Livvy was so tired she'd take a nap. Nope. I had to be at the church at 5:00 to get things set up (along with the presidency). Livvy fell asleep in the car, but only for 15 minutes. Then as I was trying to decorate the tables (which I worked on the decorations a lot this week) she wanted to be held. Fortunately I had help. We had a few women show up way early, and one of them picked her up and she was a happy baby. Later someone else was holding her and she didn't quite throw up, but it was more than just spit up. Good thing I had a change of clothes, although I'd had her in pjs so that I could just put her straight to bed when we got home. That made her feel better, so she was happy baby and very talky most of the time. She also kept trying to get someone's bread, and was very determined to get it. I think it may be time to introduce cereal.
Anyway, we had only 2 diapers left so I had to make a stop at Target to get a box. I was going to go earlier in the day, but the way that things turned out I wasn't able to. At Target she had that "stoned" look she was so tired. She fell asleep in the car, and was zonked out until I was getting her out of the car seat. Then she woke up and got MAD. I changed her diaper and put her into pjs again, gave her a bottle, and put her to bed. She decided to play for awhile before going to sleep. Can you say power nap? She put herself to sleep a little more than an hour ago. We plan on just staying at home tomorrow and getting things done, just running out to go get milk and pick Rich up from the ship.