Is my body slowly prepping for labour or am I overreacting?

Hello ladies. So over the past week, I’ve been experiencing lower back pain. Sometimes it goes but it is there most of the day and night and even disturbs what little sleep I get. On top of this, I’m getting random sharp pains in my birth canal, have had diarrhea for a week (sorry TMI) and the top of my bump hurts where i imagine my stomach now is. I just feel like crap! Also getting almost daily migraines which don’t help and docs literally won’t even attempt to try help me with them. Is my body slowly prepping me for labour? I’m only 35 weeks but the way im feeling makes me think I might be! X