Wtf happening in my life

so i am already going to be 17 soon and now my mom has been hinting around today that she might be pregnant and i am quite disgusted and feeling so ashamed and I don't want to have a baby sibling anymore and idk wt they'll do they haven't confirmed that she is pregnant.first my parents are old like 40+ and i don't belong to a rich family and if they'll have another child which will 3rd child they'll cut off half of my savings and idk that if I'll able to have coaching and all and i am having alot of anxiety and i just want to cry it out ngl if they say they keeping the baby i feel like i won't takk with them but my aunt says she won't but it still so shitty. wt do you think i should do and am i wrong.