I can't do this anymore..

All my posts are of me complaining, but life isn't so sweet anymore. I think my depression got worse.. I can't figure out how to divide my time between my 3 year old and 3 week old. I even told my mom I thought of putting my newborn up for adoption, because my 3 year old has turned awful and I can't take it. I'm trying to get my 3 year old to sleep in his own bed. He wakes at 2:30 am for me and 4:30 am as well. My newborn wakes all through out the night, he poops and takes 20 mins to go all while grunting really loud which wakes my oldest, we are stuck in one room. Then I change him and he is up for like 40 mins after that, then my oldest wakes at 8:30-9:00 my husband doesn't help much.. if at all really.. and I am too the point of running away. I don't know why I'm posting this, other than to just say it.. But I'm so lost and unhappy. I wish I would have slept that night instead of being pressured into sex and him not listening to me tell him I was ovulating. I couldn't get birth control because I was nursing my older son at the time and condoms were painful (I regret that now too) ugh anyways..