You are certainly going through a lot right now. You sound really hopeless, and I hope you find encouragement soon. I with you in the job hunt, getting rejected left, right, and center. It is very difficult for us recent grads.
My mom had uterine cancer, and she (thank God!) is fine today. She had a hysterectomy, and that was a cure for her. Hopefully you don't have cancer, but if you do then know there is hope. I know how scary the thought of cancer can be.
Please stay strong. Things are bound to improve.