How to restart/build again after 14 years?

I'm reaching out to try to get some grounding/real advice. I'm not very well equipped to deal with this. I haven't had an easy life, but I also have been depending on 1 person emotionally/mentally/everything for almost half my life now so I really dont know what to do/how to handle this.

In December I quit my long term job/career over toxic toxic work environment. I did so after talking to my husband about like the job markets tough etc etc and he said he had my back and we'll get through it. I have been TRYING (daily applications/signing up for gig work[which i still havent been approved for amazon flex]) and I have only had like 4 interviews. [[A side note is my husband also does not work, he gets disability payments.]]

Obviously I've been doing all the housework/cooking/shopping with no complaints or saying anything. I helped my 13 year old transition to online school (it was this whole thing with their 504/plans it was just easier).

One of the things I've been dealing with is I have bipolar and depression and chronic GI issues so UNFORTUNATELY I have gained like maybe 10/15lbs. I wanted to start working out and doing stuff but im so depressed and defeated over this job stuff, I've always had a job and I've never felt so worthless.

I've been noticing hes been more distant lately and we've been fighting more, so it shouldnt have been a huge surprise but yesterday he told me as soon as I get a job he's leaving. Doesn't want to try, wants to just go be his own person in the world. If this conversation had happened months ago it would have been a whole different thing but now I just feel so betrayed. I want him to be happy, but at the same time it feels like such a betrayal after everything. I've always stood by him and been there for him but when I'm vulnerable and need him/need support he decides he doesn't want to be there for me.

I understand this is one sided and I dont want to put too much out there, but I really need advice/general comments telling me how you got thru something or how to push myself through this. I don't have any family, I've done the stereotypical marriage thing where I pushed away all my friends.