Dogs 6th sense

Kristina
So my 2 year old pup and I are usually at odds with each other except when it my time of the month. We are pretty much fighting over my hubby. I don't know if it's me acting nice to her or her noticing the hormonal change in me and being nicer but it's great.  My period was due and she's acting the same as she does with my other periods except a bit more sniffing than usual but turns out I'm pregnant and she knew before the test read positive. Anyone else notice their furry babies acting weird around that time of the month?