hi, i have a problem, i am 15 years old and i have this random little bump on my left labia minora , it doesnt hurt when you squish it, and it just goes back, it is a bluish blackish purple color from what i can see, could it be a blood blister caused by the friction of tight pants? oh, and ive never had any sexual interaction before...? im really confused and kind of scared ( please help me!!