hi im only 18 years old i forgot what month i got on the depo shot for my very first time but all iknow is that my next shot is july 14 ive been bleeding for 3 weeks none stop and today when i was walking towards my car i felt something came out of my vagina i ignored it but then i had to go to the restroom and when i pulled my jeans down i seen a piece of skin on my pad. Can i get any answers please