i've had similar experiences.
i read somewhere..forget where....
that when women hear a baby cry, their bodies release a hormone...chemical...that upsets us more than ANY OTHER SOUND on the planet.
when a man hears a baby cry, it gives them the same responses as any loud sound.
so, there is reason to feel upset, besides the obvious love.
it is also chemical..so to speak.
good luck getting your thesis done. it is good you have...