Hey,
I really feel for both you and your husband. I have suffered with mental health issues and PND, my brother and son are autistic and DF has depression and ADHD.
ADHD is so encompassing. It is not just attention. It is sensory, mood swings, anxiety, very big emotions, being unable to organise, being unable to get motivated, impulsivity, etc.
Autism can bring anxiety, social difficulties, problems expressing or understanding emotions, sensory issues etc etc.
You know all of this already I'm sure. I'm not surprised one bit that your PND has made your other symptoms worse. Depression alone can cause overwhelm... Never mind with the loud noises etc triggering both your ASC and ADHD. I can completely see how young children and responsibilities can cause you overwhelm and use up so much of your energy. It's not easy at all! You have to balance your spoons, as you say, and each day brings a different amount of spoons, so every day may not be the same, depending on your level of emotion/overwhelm.
You don't have the executive function of a neurotypical, and so the people calling you controlling etc etc, please don't take their words to heart. It's their opinion, but not the truth.
I think it's wonderful your husband is so hands on with you and the children and is supporting you as a family. If a person had a physical condition, that meant they couldn't bathe or bed the children due to pain and their partners had to come help, they wouldn't call them selfish and controlling. You can't help your brain. And it doesn't have to be negative! My DS and DF are capable of so many things that my brain isn't, all because of the way in which they are wired. You have strengths other people do. And once you're on a level, you might be able to harness and appreciate them more.
With the GP, I'd ask to be referred to the ADHD and autism service with your private diagnosis. If they decline, then ask that they refer you for one on the NHS. Idk how you feel about medication, but DF is on Medikinet (ritalin) now and it has made such a difference. He doesn't get overwhelmed when the kids are noisy, he is more organised, more rational and just functions so much better. He is also on sertraline for depression, you could maybe also consider antidepressants? They genuinely do make the world of difference. And treating some of your symptoms will help others.
You can request therapy on the NHS but they're usually full and have quite a wait. I actually pay for phone therapy and I've got to keep my therapist for 2 years, she is wonderful. If you could find an ADHD/autism informed therapist it could help so much.
Your husband could call adult social services and request a carers assessment, they will then be able to signpost you to organisations that can help support you.
Sorry for all of the information in one post! I just hate to hear someone struggling so much and I can really relate. Feel free to message. Xxx