Losing weight at 34weeks pregnant, help!

Jessica

I recently noticed that I lost 5lbs in a week. I am currently 34 weeks pregnant. Should I be worried and contact my doctor or is this normal? The only thing that has changed in the last week is I started taking iron supplements as per doctors orders.

I've went from 160 to 184lbs but when I stepped on the scale today I was 179lbs.