I had developed a bunion as well. I've changed several podiatrists until I found a female doctor with a conservative perspective on surgeries and understanding for fashion and heels.
Her advice was not to wear flat shoes without good arch support so unless you have insoles it might not be a good idea to wear basic flats for too long (same for flip flops). They make a foot get wider over time because ligaments can't hold a big toe aligned well anymore.