I'm a virgin...PLEASE ANSWER?

Sorry to ask to question, but if i am a virgin why do i feel fat and have like a baby bump if i am so skinny i weigh 87 pounds i am underweight so why would i have a "baby bump" if i am a virgin? Could it be because of my period or something? Also i am so scared because i am 14 a virgin and have a "baby bump" and when i press on my left side of my stomach i feel like a lump/ ball inside could it be ovarian cyst? because when i was done pressing on it it felt like if it was bruised inside the skin? Please answer me? Thanks.