Starting to feel so overwhelmed that i am having crazy thoughts?

my son is 9mths now and so active to the point that my energy level is super low. my hubby doesnt seem to understand he goes about his business like work and errands without informing me on what his whereabouts are and he only makes it home in time for me to go to work. i work nights from 8pm and i get home 5am. i really dont get to sleep soundly till around 4pm and get up 6ish...i am starting to feel like i want to pack my stuff and leave hubby, son and just go live by myself and only deal with my son when its convient for me...the only thing thats stopping me from doing it is the "thought" of how much i will miss my baby and i will regret it and wont be able to fix things later. i find myself feeling super angry all the time but not at the baby mostly at my hubby and just pissed off! can this be post partum depression? i live in a new neighbourhood, dont know anyone much less for local babysitters plus almost no one speaks english just spanish and this is the bronx nyc so i dont know why people dont speak much english but anyway any suggestions???help??