jeltel two months is a very short period after such a bereavement. I expect too that you are worn out mentally and physically by the last months of your DH's illness. In the past the first stage of bereavement was expected to take a year and you draped yourself in black and went no where socially throughout that year. And while the widows weeds are thankfully gone, the recognition that it will take you at least a year to lose the acute grief at his loss seems to also to have been forgotten, but remind yourself of it regularly.
You are already doing really well to be taking yourself out to cafes and going to the gym. Do keep that up. I am not sure time heals, but with time you do get used to having had the loss, although decades after, some small thing will suddenly hurtle you back through time with a sudden reminder of the person you mourn.
You are doing the right thing in joining a bereavement group, indeed you are doing everything any councillor would recommend.
All I can say is welcome to Gransnet, I haven't seen your name before. You are among friends, many of whom have experienced a loss like yours, so keep reading - and posting on this thread and on others that take your fancy.