I found this bump on my vagina lips its been two days and it doesn't hurt but if you touch it it feels a little sore any idea? Im 17 and this has never happened to me and I'm a little nervous because I am sexually active but I haven't had sexual contact in over 4 months and I'm afraid of telling my mom because I don't want her to know I'm sexually active. Any thoughts of what it might be?

It could be as simple as an ingrown hair or as complicated as herpes (Genital Herpes - AOL Health (http://www.aolhealth.com/conditions/genital-herpes?flv=1)). I assume you are referring to your vulva - if you are sexually active you should read and become aware of your own physical body.

I wouldn't wait much longer before telling your Mom and going to a Physician.