I am 37 weeks and 5 days pregnant, these two days i have a mild fever of 37.5C, and bit of a headache, my lower belly is very tight, my baby is not moving as frequent and strong, today i am experiencing a bad lower back pain, i have my husband massaged me back and put heat on my back, but the pain just won't go away! am i in labor? should i be worry? and what else can i do to make it feel better?