Since my moms passing, my dad has had memory lapses which I consider normal. One thing he has started doing is constantly patting with his right hand. There isn't any definite beat. He thumps the chair by rubbing his fingers each time. This is constant. I have asked why he does it and he gives me multiple answers. Ultimately he doesn't realize he is doing it. Has anyone else experienced this?
I had a great aunt whose husband died. They were always extremely close. He called her "wife" and she called him "sweetheart". After he died she was in bed crying and she would say over and over. My heart. My heart. Everyone thought it was because she loved him so much. A few years later she had medicsl tests and we were told she had had a heart attack in her past. We could not imagine when that was. Finally we remembered her calling out my heart, my heart. We decided that must have been when it happened.
After losing a spouse with all of the other reasons already mentioned it may be impossible to conceal the loss of cognitive abilities. This can also contribute to stress because the partner is not there to support them.
Huge hugs to you. It's not easy.
But, gosh, this poor man lost his life partner less than 2 months ago. Weren't you expecting some disturbances? Mourning takes many different forms. Some people have cognitive issues. (I did. Didn't cry but had memory problems for months. I was surprised to learn that was a "normal" way of experiencing grief.)
He deserves a good checkup, and medical support if necessary. But it sounds to me like he needs a lot more time to adjust to being a widower.
Also, if he hasn't already, time for a check up with his primary doctor.