Weight gain

Rebecca
I need some advice ASAP- I am 39 weeks as of Friday. Monday I had an OB spot and weighed 134(about what it's been for sometime). Today I had an spot because my kid thinks it's cool to not move until I go to the dr...anyways, weighed 138...I go home and take everything off and re-weigh. My scale said 141! My diet hasn't changed, my urine isn't coming back with proteins, bp only slightly elevated(has been last few weeks, they say no concern) and my belly hurts. Would you call back and ask what's up? I didn't have the issue with my daughter, and that seems to be a lot for my scale to "be off".