Getting your eyebrows waxed for the first time?

I'm 14. I have never had my eyebrows waxed and I'm going to get them done in a few hours. I'm a little nervous. My aunt is the one doing it and I trust her so I'm not nervous about that. I read online and my cousin said that it only stings. I also heard that my skin around my eyebrows will turn red. I get headaches really easily. Do you think this could cause a headache? Thanks for your answer!