Need to vent...

Ok so I'm usually pretty quiet and always put everyone else's needs before mine (like most moms have to) but lately life is just really getting to me. Stay at home moms are just so under appreciated. I hate that people think I just sit around and do nothing all day. Are you kidding me? I have a 1 year old and a 2 year old. My job never ends. I love my husband and he's amazing but I'm so tired of him acting like he is the only one who works. I get that it's hard getting up every morning and leaving and having to deal with dumb work stuff but I work too. And I don't get to clock out and come home. My job doesn't ever end. I feel like I'm going crazy. I really do. I just need a break. I feel like I am constantly cleaning and changing diapers and keeping my daughter from killing my son. It's like that's all I am now. And a few months back we took in my husband's cousin (20) and are helping him out but he and my husband are really close and all I do is get jealous all the time and get angry cause he gets to work with my husband he's around us all the time and they talk to each other all the time and my husband acts as if it's normal and maybe it is but I feel like I'm the 2nd wife and I don't know I'm just so tired and I hate having these feelings. And anytime I bring it up we argue and I feel like I'm being petty. Idfk. I just dont feel special and ever since having my son I've been gaining crazy weight and I feel awful about myself. Idk. I'm just so tired. I needed to get this out of my system because I don't really have anyone to talk to about it.