Hi there, you sound very normal to me. Grief affects us in many different ways and there is no pattern to follow and there is no “coping well” to live up to. Part of you may well have shut down temporarily because of hurting so much but don’t worry it takes time to process everything - there is not only the shock of losing your husband whether or not he had a long or short illness or condition but the loss of your relationship and all that it meant to you, to both of you.
When I lost Helen, my wife, my feelings, sometimes what felt like lack of feelings, came in waves - it is no wonder people describe it as a roller coaster. Don’t worry if your feelings do catch you out later, it is all part of the healing process.
I do hope you can get some counselling soon. If you haven’t tried through your GP try through him or her. I got counselling through the palliative care team at our local hospice.
Take care of yourself, you are not alone.