I am feeling pretty down and out , is there a way to change my thinking to more positive?

Every day of my life I am treated very bad , I am mentally abused by all the people that I am surrounded by. I am 23 and married yet live in my parents guest house due to the economy and raising my infant. My husband constantly calls me horrible things when he doesn't get his way , when I don't do something right , or when I don't agree with him. My husband says terrible things such as I'm pointless , all I am good for is a nanny to him , that I'm a slob (even when I just forget to clean a few left over dishes because Im busy). My husband then when hes happy getting his way while i'm his robot just adores me. I am a stay at home mom taking care of my baby because we cant afford day care so when I'm at home my mother is constantly haring me really bad. My mother calls me and leaves me texts all day till I finally come over there for her to say "get the hell out of my house and they she continues to scream for my father who treats me like a retarded child". I'm just so fed up! I take really good care of my son and I don't party ,smoke ,drink, or even as go hang out with my friends. I am tired of feeling thrashed every day to the point I'm starting to feel like im going nuts surrounded by all these cooks. My brother recently literally went skitzo and hes always freaking out as well so Sense I am at home I have to carry that heavy burdon. I feel really depressed and I'm starting to feel over whelmed and immobile. I love all of these people with my whole heart but It's to the point I have to let them all walk all over me or else it's worse off. I always feel so nervous like I have a big lump in my throat and nasty erfly's in my stomach. I'm tired of feeling like this! sorry for the errors I'm typing fast