Baby movements

So I'm 36 weeks exactly today and I am 2cm dilated and 50% effaced. The past few days my daughters movements have been super painful and I had a lot of lightening pains. Im assuming this was her dropping into place because my stomach seems lower. But now today she seems to be a lot lower and less active. I can still feel her movements but they dont hurt anymore and they are a little less frequent. Does this mean im going to be going into labor soon or is something wrong? I've also started to have close to diarrhea but not quite and my hips and knees keep cracking