@twiggy24
Hang in there twiggy. Frustration on their part is normal. From my experience, it helped when I act supportive and always give assurance. It calmed down my husband. He is past that stage. He is at a different level now. It's still frustrating on my part but I always remind myself that it is not him, nor his fault. It's unfortunately part of his illness. Positivity and negativity resonates to their emotions, so I try to stay positive. I treat repetitive questions as if it's his first time asking me. No sense stressing. When he started repeating himself, I alerted is primary care doctor. We got a referral to Cleveland Clinic. After brain biopsy, he was diagnosed with mild dementia with alzheimer's. Support groups, therapies, workshops started after diagnosis, which helps a lot.
You might want to ask his doctor about his changed behavior. I hope your husband doesn't have dementia.