To those who have already given birth

Am

(and still come to visit us) did you feel "off" the day you went into labor? I definitely don't feel like myself. It feels like something in my mind has changed and I just feel like SOMETHING is off. I'm dizzy, I'm tired but can't sleep, I'm grumpy but I'm not. I'm hot but I'm not sweating (which is definitely not like me I always sweat) and I'm hungry but I don't physically feel like I can eat. Just wondering if you feel different when you went into labor or not. I felt fine up until hubby and I had sex so idk if that has anything to do with it or not.