What do I do, my mom's belly looks like a balloon?

i knew my mom was startin to look diferent, but ididnt know she was pregnat, so she showd me her belly last night and its huge...she said she was like 6 months along...she was talkin about havin a baby months ago but i didnt think she was actualy gonna do it......i feel so selfish for thinkin this but, is it too late to have an abortion? im 14 and i dont want any brothers and sisters...i should just kill myself