Should I buy some ballet flats?

I’m going to church on Sunday and the only shoes I have are sneakers, flip-flops, high heels. I’m 13, so the high heels will definitely not work. I do have a nice pair of gold sandals I could wear one inch, and then a pair of wedges that are a bit high but might work, but I’ve been planning to get some ballet flats for a while. Because they’re basically the universal shoe. If you’re not sure Whether something is casual enough to wear sneakers, or is formal enough to wear heels, then ballet flats will work regardless. I’m not talking about places where it’s obvious you should wear sneakers like hiking, but you can wear ballet flats anywhere from school to a party or anywhere formal. Including church. So basically, I need an appropriate shoe for church and a prettier shoe for school. But I’ve been saving up my money and I’m not quite sure if it’s worth spending. I can get ballet flats for $ 5 at the thrift store, but every dollar counts. And my 1 inch heels are appropriate enough. Plus support my mom has some really tiny heels, less than 1 / 2 inch, although I do not really like them much because they’re basically without any strappy mules. So would it be worth it or not?