I’m really starting to think I don’t want to do this..

I don’t know what to do.. I have a 8 month old girl and found out I’m pregnant a couple weeks ago.. I’m 7 weeks now. I’m overwhelmed, feel suffocated and just don’t know what to do. I don’t know if it’s the extreme nausea and the fact that I haven’t been able to eat anything in 3 days. But I don’t know if I want to do this. I dont know if I can. I feel so drained not here and feel guilty just thinking like this but idk what to do. We already told people. I just idk what to do..