Hi, I'm 18 years old, I stand 5"1 and I weigh 88 pounds. Recently, I enrolled myself at a gym and have been more active than I normally am (I'm naturally a lazy person) I've always been skinny but I've lost 3 pounds in 1 day. I'm currently recovering from diarrhea. It's almost been a week? Since I started experiencing breast pain but now it's gone, although one thing that caught my attention was the darkening of my areolas. My last period ended August 5, but that came after a period that was 2 weeks apart. I'm still a virgin by the way. Please help me?