Am I Depressed, Or Is It Just girl Horomones?

(Sorry if i spell anything wrong in advance) Hi. Im a 12 year old girl, Living with my Dad, Stepmom, step brother, and step sister. My REAL mom abused, & starved me. Thats not the point, though. I think im depressed. I cried while i typed all of this mess. Well, i cry at night mostly, sometimes in the day. I was in the doctor last week (checkup) and in the middle of the doctor talking, i bursted out in tears. My stepmom thinks its just girl horomones, but once, before the horomones, when i was 8 or 9, my dad turned on The Reason by Hoobastank (which fits both my and my realvmoms lufe perfectly) and i cryed secretly, which was hard, because i was in the car. Only the adults in my family know how i got seperated from them, and why. last night, my aunt only described how i dont have the same momto my sister, at a resurant, and i had to fight back tears. So, does it sound like depression, or just Horomones? Mature people, only...please? Thanks for your time. xx