30w with Di/Di twins- low cramping back pain

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With my first I didn’t go into labour until exactly 40w and the contractions came on fast and strong. I had crazy dreams last night of going into labour early and could not get comfortable these last two nights due to low back pain. I also have been experiencing more BH’s which is to be expected. I’ve had loose stool last night before bed and again this morning (normally I only go once in the morning). My back is still killing but I’ve got a heating pad on it & plan on seeing a chiropractor in a few hours. Anyone else experience something similar and go into labour early?