All these symptoms - how long did it take you?

I've been having back contractions and period like pains for at least 1.5 weeks now. Also, my bowel movements have increased a lot. I used to be constipated but now I go sometimes two times a day even. I feel like he dropped really low and also I am fatigued SO MUCH. I can barely do anything without feeling like I ran a marathon the day before. Anybody had similar experiences? How long until actual labor started for you? I'm 39+0 today.