Welcome! From what I heard it's likely most autistic people have some co-morbid. Beware that your doctor might knew it all along but thought it's not your biggest issue. Like one of my sons has ADHD as well, even though they knew it they thought autism was the bigger issue. My brother has multiple mental issues and once a social worker wondered if he could have autism, but shrugged it off, as it wouldn't have mattered anyway.
I do think seeking a diagnosis would be a good step to take for self discovery. There's no treatment for autism itself, but many meds for bi-polar. So, you can see why doctors might focus on things they can treat.
As for fights with your husband. It takes two so it might not be only your problem. Nobody is absolutely normal. You don't have to take all the blame. You can both try to understand each other better. 
_________________
AQ score: 44
Aspie mom to two autistic sons (21 & 20 )