When did your hormones kick in?

Ok so I'm 25 weeks as of yesterday and noticed a huge difference in my emotions. When did your hormones kick in. I have been pretty even keel up until now. I know that some of it has to do with worrying about when the baby comes and what I'm gonna do and the fact I haven't even registered or thought about a baby shower yet. Shoot we don't even have a name list going. But I do feel like I am a little more testy. Or maybe I just need to have sex. That usually helps. Lol. Thoughts?