My sister is 10 weeks pregnant and finding the first trimester quite hard going.
So, I am not hurt she forgot per se, but that she was reminded 2 days later by someone and she then took 2 days to call. Then, she made a a passing comment of 'how is your tooth' before talking about her pregnancy at length.
It was quite invasive dental surgery, I am only now, a week later, able to start brushing my teeth again and still taking strong painkillers.
I understand her head is so into baby stuff at the moment, but I feel upset she didn't even seem that interested or any attempt to apologise for forgetting.
Maybe I am being unreasonable for being annoyed...