Is this a prolapsed uterus...scared tmi alert?

i had a 10 lb baby 3 weeks ago its my 3rd child and it literally feels like something is about ready to fall out of my vagina and when i check myself so to speak i feel something that feels like a ball idk i think it might b a prolapse it just got really bad tonight after my walk and im calling my obgyn tom to get checked out i dont even want to walk when im sitting or laying its not so bad but it still feels like something is there but when i walk its bad...ive read some stuff online bout a prolapse but it just scared me like im 24 will i really have to get a hysterectomy im just recovering from childbirth but i cant imagine feeling like this anymore its driving me crazy...im so scared and stressed bout this whats going on with me anyone that has had this happen...it doesnt feel normal please share your info thank you