Not a doctor, but I believe this is well established that grief can affect your memory. There is plenty of hit for grief and memory loss on Google. Likely this

Not a doctor, but I believe this is well established that grief can affect your memory. There is plenty of hit for grief and memory loss on Google. Likely this is only temporary. But I guess that the lack of sleep, which is also known for affecting memory, is also taking its toll. So the combination of the two might explain your state of confusion.