Maybe pre-labor, or just imagining things?

I had no signs of going into labor with my son two years ago. This time I'm a bit more nervous. I have some symptoms but not sure if I should follow them. (TMI) Yesterday I had looser stools than usual; like right before diarrhea. Well I ended up getting sick in the middle of the night and had bad diarrhea, followed by projectile vomiting. I never leave my house so if I got "sick" from someone, I wouldn't know how. Well, I'm only 36 weeks, and have an appointment in two days. The doctor and I both feel that the baby will be early. And all day yesterday I had BH which is unusual for me; and only a few would subside after drinking water or changing my position. The baby also kicked more than usual. Please don't give me that "oh there's no room so the baby will feel like it's moving more." I know my child, and it doesn't kick during the day that often, but yesterday it was highly excessive. My back and cervix pain is higher than usual too. I am overly exhausted as well. I had been very dry lately (uming from urinating more than usual and wiping more) and then this morning I started getting thick discharge out of nowhere. My urine is darker in color, etc. Could I just be imagining this? Could it be pre-pre-labor? Or just the end of the pregnancy nearing? Again, this never happened with my first.