Worried I might have PCOS

Hi I'm 16 years old and I have this friend who's 19, well anyway we are really close and we were talking about like our body struggles and periods. Her an I are VERY similar in how we are and by that I mean very irregular periods (mine is actually 107 days late as of today) when we do get our period it's very painful with cramps and is a horrible heavy flow, have dark hair all over the place like the face that's hard to hide, lower voices then most other girls, and easy weight gain even though we eat healthy and work out occasionally. Well anyway she has PCOS and was saying that it may be a chance I have it since I have all the symptoms of it. I haven't figured out a way to approach my mom about the topic and was hoping there would be some moms who reads this and can help me out on a great way to bring it up without worrying her I'm pregnant (trust me I haven't had sex)