Is it wise to be a 20 year old single mom?

I am 19 years old and just found out that I am pregnant. I would be 20 when the baby was born. After recently battling cervical cancer, I only have enough of my cervix left to support a baby. I have HPV and harbor a very aggressive cervical cancer strain, so it is possible that the cancer could return and if any more of my cervix were removed I would no longer be able to carry a baby. Also, I have a rare hereditary uterine disease. Every woman on my dads' side of the family has had a hysterectomy in her early 20's due to this impairing disease. I have ALWAYS wanted to experienced motherhood, preferably of my own biological child. My family & I have been living in fear that I would not be able to. Also, I have always been against personally having an abortion. My 24 year olf bf [he will be 25 when baby arrives], however, is begging me to get an abortion. ANy advice?