Lesser known Early labour signs

With all the babies starting to come early, I've been researching a whole lot. I'm a FTM so I have no idea what to expect.

Im 36weeks today, for the past several weeks ive had period like cramps back aches and now I've recently come down with flu like symptoms, it literally hit me out of no where. I have read a few medical studies that say flu like symptoms are a lesser known sign that labour is near. Doesn't specify how close labour is, but that's not the point.

I'm not interested in the larger known signs (bloody show, contractions, water breaking) I'm interested in the lesser known ones.

So my point is, what was your lesser known symptom before labour?