I'm the maid of honor at my sisters wedding. It's in California and I live in Iowa. Her wedding is Friday the day after thanksgiving. Unfortunately, we are open that day. He told me he's unsure he can approve my vacation time because of how many employees will likely need the same day off. He said he won't know if he can approve my vacation until early November. I need to book my flight. I don't know what to do!!! Do I just tell my sister I can't be in her wedding and not attend? I can't wair until early November to find out whether or not I can book my flight/attend the wedding. Any advice?

So I'm getting married in a few months and today my fiancé told me getting married is a lot to take in. I struggle with anxiety/depression so I tend to over think and worry about everything. Just wanting other people's opinions?