I think im depressed?

im always in a bad mood... i dont like doing anything anymore all iwant to do is sleep.. i end up being rude to people for no reason and "snap" on them then feel bad later realizing i yelled for a stupid reason i find myself crying all the time for no reason too and have mood swings alot i over react about everything and feel guilty i want to see a therapist but how do i go about asking my mom to see one? we dont get along and i hate talking to her more than anything else... plus we sorta dont got the money for it what should i do?