I agree with the ladies above, personally I would call and just reassure myself that all is OK, it sounds like it but hey this is new to us all and it cannot hurt to ask!
Then I def recommend physio, I have a v bad back and I go for physio once a week, it doesnt feel like much at the time but the stretching 'creates room' inside which gives me some relief fromthe constant pain. I have also been avoiding panadol etc, but now take a panadol here and there to allow myself to get comfortable and rest. Heat helps me a lot - showers, baths and wheat bags.
Not long to go and you will have your bubba with you, it is a lot for your body to go through but you are close!
Hope thay helps and good luck!