My Scale has gone Mental!

I've been on my pre-op diet for 24 days now, and I've been weighing myself every day to track my progress.  My surgeon had a weight target he would like me to reach before surgery (which is Monday...eek!), and I've been a little bit obsessive about it.  

I've recorded a loss, even just a little bitty one, almost every day since I started this pre-op diet at 356.2 lbs.I drink 3-4 protein shakes a day, I eat 2-4 oz of lean protein, and I drink a TON of water.  I get 70-100 grams of protein in every day, and I average 700-900 calories.  I have only gone over 1000 calories on one day, and I painted my office that day and was feeling WAY light-headed, so I ate a little more.  Sunday, my weight was 331.2 (finally under a BMI of 52, my surgeon's goal for pre-op).  

This week, my scale has been a little...off.  It has stayed steady or even gone up almost every day since Monday.  Yesterday, it said 332.0 lbs. This morning, I stepped on and it said 321.2 lbs.  I know enough about my body and how it works that a near 10 lb loss in a day is probably not accurate.  So I stepped off the scale, and I stepped right back on as soon as it reset.  334 lbs.  That didn't seem right either, so I tried again.  328.6 lbs.  And again, 342.2 lbs.  I haven't been able to get a reading that's the same two times in a row all morning.  

Has anyone else had this happen?  What am I doing wrong?  Should I put the scale on a different surface?  Is this a sign that I should just stop weighing for now?

Make sure your scale is on a solid, level non carpeted surface. If the wonkiness persists, I'd look into getting a new scale or only weigh yourself at your surgeon's office. If the numbers are really freaking you out even if you know it's the scale screwing up, yeah...stay off the scale if you can.

I had funky weight fluctuations pre-op too, and sure enough...it was time for a new scale.

It might need a new battery?

As a former scale jumper on/off regularly, I suggest you weigh yourself only once a week.  I drove myself crazy being obsessed with the scale and what it said.
I suggest trusting yourself - as long as you are eating the recommendations your surgeon gave to you, drinking water (exercise or being active), the weight will take care of itself.  Your weight doesn't change that much that it would be helpful to weigh so often.  Body fluctuations occur so weighing every day really isn't beneficial to you.

Pick a day that you're going to weigh and ONLY weigh that day one time, and continue that every week. 

My scale was doing the same thing so I bought a new one and the crazy readings stopped. Would change battery or buy a new one.

Mine did that too, I changed the battery and it has been fine since.