Need some words of wisdom/support

We got married on Saturday (yay!), and despite the mishaps it was a beautiful day. However, I can’t let go of one thing because it really was SO important to me. I’ll try to make this short.
My husband and I have two kids, they are 5 and 6, who were supposed to be our ring bearer and flower girl. The kids knew their roles and were so excited, they’d been asking if it was time for the wedding for at least a year. The morning of the wedding, we asked some friends of ours to take the kids over to the ceremony site because I was riding with my mom and MOH, and my husband was leaving early with his BM to set up chairs. Apparently, when the kids arrived my husbands family grabbed them and had them sit with them like three rows back In the middle. When I arrived, my MOHs and I had no idea where the kids were, if someone was sending them back to me, or what was happening and they were playing the song I was supposed to walk to before we even got up to the area so we didn’t really know what to do. One of my MOHs was going to go get the kids, but we knew as soon as she walked out that would signal the professional, so we just went ahead and walked. I know it’s over now and there’s no going back, but I’m really pissed that no one sent my kids back to walk with me and that I didn’t really get any pictures of them. My husband says no one knew they were supposed to walk, but I don’t get how you could not know. He also had no idea where the kids were even after the ceremony until his sister came up and told him that they kept the kids warm for us like she deserved some kind of congratulations or thanks for it. I didn’t say anything to his family about it, but I just feel so sad about it now. Everything else, even the things that didn’t go according to plan, was great and we had an amazing weekend, but I feel so sad about the kids not even really being part of the wedding. It just makes me want to cry because it’s a moment I can never get back. I just can’t fathom how they could possibly not know the kids were supposed to walk down the aisle. I know I just have to let it go, I’m just finding it really hard to do that right now. I appreciate any words of wisdom.