What do it mean?

Bernadette
I went to the Dr yesterday for the 1st time since Oct I was trying to find a different practice to go to in the mean time. So I go to the Dr and my due date is Feb 26th I'm about 28+3 along the Dr told me in measuring at 30-31 weeks. He's gonna give me an ultrasound next week just to check and said he wants to see me every 2 weeks. Can someone tell me what it means is it a good or bad thing?