I need your help Almost 37 weeks My stomach was pulling, in the delive…

I need your help Almost 37 weeks My stomach was pulling, in the delivery room they examined me on a chair, did an ultrasound, said everything is fine and let me go home Now I'm at home, went for a little walk, put on underwear and pants and realized that everything got wet And underwear and pants in brown water, without mucus and so on What could it be?