Baby girl name advice

We are naming our baby girl (due July 5) Melissa Kay. Melissa is my husband's mom's name (she is deceased) and Kay is my mom's middle name. We love the name, but we really want to call her the whole name. I've already noticed people just calling her Melissa and I don't like it. I'm wondering if I should keep it the same or hyphenate Melissa-Kay as a first name and give her another middle name? But then idk what I would add. Any advice? Maybe from anyone being called two names?