Gender guessing theories

Hey I’m 8weeks today I have my first doctors appointment tomorrow. I know it’s still a long ways away before I find out the gender of my baby, but I can’t wait. I’ve always wanted a boy. It may be because I grew up with two older sisters who put my mom through hell as teens. Or because a lot of family health issues including mental health issues run on the woman’s side of my family either way I want a boy I’m even already referring to my baby as Luke which will be his name if I have a boy. So I am looking at all the signs and wives tales of how to determine gender long before your doctor can tell for sure. I’ve heard a lot already. Ramzi theory is one. I’ve heard that if the heart rate is over 160 it’s a girl and if it’s between 150-155 it’s a boy. If you don’t have a lot of morning sickness it’s a boy. And I’ve also heard there’s a test you can buy to determine gender at like nine or ten weeks. So I’m wondering what theories have you heard of for determining gender early. I know most of these probably have no scientific evidence but I think it’s still fun to try them.