Hi Simply Monet,
Woman, you're going through a lot of things, breathe.
It's ok to feel overwhelmed. You are all going through so many things. Try breathing and taking one thing at a time. When you look at everything, it may seem overwhelming, but if you break it down, things may seem more manageable. And lean on others, family and friends, colleagues, this forum are an awesome support that could help you a lot.
First of all, take care of yourself. Take time to breath, to sleep well, to eat healthy, and to do stuff you love and relax you. You need to be ok, to be able to be there for your kids and your husband.
Simply Monet wrote:I am overwhelmed because I feel so helpless.

He is trying his hardest to juggle 177 alters, trying to act normal w/me even though he hears all the voices and thoughts as if he was in a crowd constantly, he is at times rarely here because he is constantly switching because he can't handle stress therefore he is constantly losing time, he is also going to school in which the 2 classes he takes he doesn't actually take (2 of his alters take them), he is being a wonderful father when he is here to our 4 kids, he is trying to work doing databases which he use to do before they started coming out and he can't complete it because parts of him are protectionists so he's honestly MOST of the day on the computer, then he's trying to make sure I'm happy and OK and I try to make sure he knows I love him and will never leave but he believes I'm going to get tried of it all. What else can I do?
What else can you do? I'm guessing not many things differently to what you're already doing. Being there for him/them, showing your love to them and letting him make that process.
You could talk to his protective parts (and all of his parts) and explain why him working on the database is important for him and could help him reduce stress. You could show them the money he makes could help him feeling less stressed out, and they could buy some treats for themselves as well. In that sense, they would be working as a team, and letting him work on the things he needs to work.
I think him acting "normal" in front of you eventhough he's listening all the voices inside, is him trying his best to be there for you. You can tell him how you feel, I guess you have, but the thing is he'll have to work on believing it him self. Believing that even if he switches, you're still there.
Regarding your dad, try ignoring his non-understanding attitudes. Might be difficult, but try to just ignore them, maybe one day he'll realize your guy is going through a lot.
Can your mom give you a hand regarding your kids? Taking them to the movies, talking with the one who might have a mood disorder, or maybe taking him to the School psychologist?
Regarding your step son, what if you give him a specific task to do. Once I saw this documentary where a guy with ADHD play a great role at handling a stressfull situation specifically because of his ADHD. So, if he could find something he'd feel comfortable doing? And helping?
Una makes a great point regarding your guy swtiching and leaving at night. Talk to grown ups in himself. Give them task to be protective at night, or to accompany them, and help them come back home.
Simply Monet wrote:Therapy isn't going fast enough (it seems - we are establishing a foundation first before the T gets into the DID and PTSD ) but it's all time that I feel we are losing. I sit here and just look at him wondering whether it's my depression that finally made him pop...

he's always said how sad he was that he couldn't make me better...
You're not loosing. Every step he takes it's toward healing. Things just take time. And usually there is chaos before there's order. It's not your fault he's switching, it's the way he knows how to handle things. He also can't make you better, it's your job, and as I read, you are feeling better, and I'm happy for you.
And about him not being the core... all of him is your husband. The one you recognize as your husband is a part of him, as it's his 3 year old.
Maybe now you need to take some time off, maybe stop reading for a couple of days, to let everything process, maybe to occupy your mind on other things.
Take some time to breath truly.
Sea
Taking myself some time away from PF. Sea (Dec, 2016)