They were often torturing me with practice contractions, and I haven't…

They were often torturing me with practice contractions, and I haven't eaten anything new besides diarrhea. No poisoning. I read that this is a sign of labor. My belly dropped, milk started dripping from my chest. Is all of this a sign of labor? In the first trimester, I didn't experience anything like this ??‍♀️ At what week did you give birth to your second child (just curious)?