You are doing awesome!

And I love that you told DH to clear the way for your weight bench and treadmill - fantastic!
One thing you might try with the measurement tape. Grab some string or ribbon that doesn't stretch. Put that around your waist and mark where the end hits. Then you can lay that out on your measuring tape, and measure what is left over - just add the measurements together! That should at least get you close to an exact measure.
Keep up the great work!!