I've been waffling for a while on DVM, PhD, or MPH, and when I started writing personal statements it became clear I really want an MPH in epidemiology, not a PhD... I already have 1 person writing me a LOR for PhD apps, and I asked two others to write one for both DVM and PhD! Now I just want them for vet school, but I'm so embarrassed to change my mind about something so huge. I don't want to come off as flighty. Any advice on how I should phrase it to them?