help please

i just recently found out i was 2 months preg. i already have a 2 yr old,i havent told my bf yet for he doesnt want me to have any more kids. We used protection and i was told i couldnt have any more kids but here i am 2 months preg. i weight between 102 lbs and 103 lbs at 5'5. Well my doctor wants to see me tomorrow to discuss our options b/c he said if i was to go thru with this pregnancy i would end up killing me, the baby or both for my disease is progressing tremously. i dont believe in abortions im a strong disbeliever for that and a part of me wants to have this baby but i want to live too. i already have had 1 miscarriage and i dont know what to do.Any advice or opioions would be greatly appreciated. what do i do? do i take the chance and have the baby which i doubt will happen im thinking ill miscarry again since i cant keep food down, all the meds im on and on top of that how sick i get very easy,plus i have a iron insuffiency,pancreas insuffiency and vitamins insuffiency. i take 4 to 6 treatments a day, 10 pancreas enyems 3 times daily,most likely will be put on a gtube at nite and oxygen, reglan and zantac 4 times daily,and a lung transplant here in a couple years(so they say). they give me to live til 35  but not much longer :( what should i do?

please help

faithful