Hello early dementia is frightening for everyone and the whole family gets distressed, frightened and angry.
Firstly whilst you and your husband can get a memory book together of past events, photographs, music etc that will help to retain his past memory. Distant memory is the last to be affected so looking at a happy photo of say 20 years ago will generate positive emotions in your husband and these positive emotions last some time after the current memory is gone. Emotions last much longer than the memory so upset tends to generate unhappy emotions that cause distress for some time.
Secondly be kind to yourself, you are carrying a number of metaphorical stones on your back that, even if happy weights, grandchildren, work and husband and juggling then all will get you down. However busy and concerned you are with others it's vital you love yourself. It's easier to love others when you love yourself.
Thirdly non of us are perfect and when caring for your DH remember good enough is good enough.
I am a Retired nurse who specialised in later years in dementia care so hope my comments are helpful.
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