relationship with family shitty !

Ta
I'm currently 18 and just started my new job this week and currently 19 weeks and 2 days and it was an accident, well got pregnant and now that he doesn't have a job and saying the baby can live with me is bothering me I'm starting to think about adoption even though I really don't want to,
My family is being shitty, my mother hates being wrong and when you say she's wrong and have proof she threatens to kick you out or calls you stupid and ect .. and I'm tired of it ... I have a plan to move out as soon as possible (for the people that says we'll move out) but if i say something it's you gonna be living in the ghetto or I say anything about a car she says it's going to be a old beater and I say well a persons first car is usually very old and moving out on my own I think is positive thinking no matter where it is, I can say hey I have a place and car, I don't even know what I want to do with college everything I say I want to be even when I was little it's oh you have to be smart to do that or whatever (she had me tested cause she thought I was slow in 4th grade but I'm above average in a lot and average in things) teachers always say I'm very smart, but I'm tired of dealing with negativity from Her or my ex/ baby father.
My ex said he wanted a family and said we was getting back together so that's why I didn't move on but He said he wanted this baby and family so that's why I didn't do abortion and plus I don't believe in it but now that it's clear I'm doing this alone I'm starting to get depressed, my mama said to get my ged so I did and now it's you're a drop out I'm like you told me to do it because I can go ahead and start college but now she saying I never said to drop out and I just shrug it off , then she text me and say I should get rid of my guniea pig cause it's not good for a new born I said no, but tonight I brought it up because I've been having bad allergies around him and asthma since I'm pregnant and I thought about the baby so I said I was gonna do adoption it's no you're not you're keeping him and now idk what to do. 
I get threaten to get kicked out then she says don't contact her family and I shrug it off but she stayed with her mom till 30 and we was livin with my grandma and it's like now that she has a better car or her house she forgets where she came from and now I'm 18 I should automatically start off good.. with a good car or place and when I got my first job she gonna say its just Wendy's , me where this is my first job I was excited to say I had one. 
I feel like I'm over reacting but I'm starting to get really depressed over all this ..