How Many People are Gluten and/or Dairy Intolerant?

My mom, grandma, aunt, cousin, and I are all gluten and dairy intolerant. I wanted to know if anyone else is too. Please share your stories and wisdom. I'm 12 and diagnosed with Hoshimotos this year. When I have gluten, dairy, wheat, or corn I have terrible mood swings and "attitude attacks". What happens to you? My mom just gets sick, tired, and cranky. Mine only last a day or two but my mom's lasts at least 2 weeks!! Any advice????? Thanks!!!