WRT seeing your Mum - do what you feel is right.
Against lots of advice from DH, Dsis, BF I went to see my Dad and was so pleased I had. He looked so handsome in his suit and I stroked his hair (I had been warned that it can be a bit shocking for you if you touch their icy skin). I spent a couple of minutes with him and felt comforted and at peace.
When Mum died a couple of weeks later I felt as though I should see her as I had been to see Dad, but in my heart of hearts I did not want to for some reason. I went because I felt I should and it was one of the worst decisions of my life. My FIL told me not to go vecause of a misplaced sense of guilt, but I did. I practically ran out of the room and totally broke down. It wasn't my Mum in there I so wish I hadn't been to see her, but know that I would have felt guilty if I hadn't as I'd been to see my Dad so recently.
So, what I am saying, is do what you feel is right at that moment and be prepared for all emotions - do not decide beforehand.
With Dad, I thought I'd lose it and didn't - I had a little weep afterwards but was so glad I'd been. With Mum, I expected to feel the same and totally lost the plot. Maybe, it was because they were so close together, I don't know.
Take care. xx