What were your symptoms?

What symptoms did you have before going into labor? I'm 37 weeks today and have been having sharp cramps all day long but its really low. I know its just the baby preparing for birth but when I was in the shower something brown came out of me but went down the drain before I could really see what it was. I know my baby is fine, hes been moving like crazy all day and I haven't had any contractions, just sharp pains. So I'm wondering what symptoms (other than mucus plug coming out or water breaking) did you experience? (I was induced with my first so I dont really know what it's like or what it feels like to go into labor on my own.