With my second baby, I formed some food intolerances that I have never had before. I could not have anything with MSG or I would be very ill. Also beef was off limits. Starting in the 3rd trimester, I could tolerate beef again, but the MSG thing is permanent now. I would say take a look at what you ate last week and see if you notice a trend.
And so sorry about your MIL. My grandmother died about a year before my daughter was born. All the great-grandkids knew her and she them, except for my baby girl. That made me very sad. But my daughter has so many of her traits- headstrong, independent, etc. Even other members of my family have commented on it. I see my grandmother in her all the time. It's the little blessings... Take care.