Weight limits, pushing your limits!

I'm currently 31.6, I have a scheduled c section at 39.1 (if I don't go into labor before then) well I've been finding myself "nesting" & it's driving me crazy. We live in a SUPER SMALL 2 bedroom & our 4 year barely has enough room in her room for the baby, so we planned on using a pack n play in our room (we will be moving end of Sep-Oct) well since I don't have anything baby to nest, I've been rearranging the house & bedrooms & trying to figure out the best possibilities in function for when baby gets here so I don't have anything to worry about! But I've been really nervous about all the "work" I've been doing & it hurting the baby! Should I be concerned!? If I feel a little weak, I'll stop & drink some water.