What is happening to me?

In all honesty, you seem to be over thinking this. The scale is telling you that you're ill.  That's all. 

Wow, throw that scale out of the window and concentrate on taking care of your medical crisis!  Yep it sounds like you live and die by the scale.  You are absolutely crazily obsessed !

Hope you resolve all and best to you.

OH I FEEL FOR YOU . KIDNEY STONES ARE NO JOKE. I HAVE HAD THEM 10 TIMES. I WAS TOLD THEY CAN BE FROM NUMEROUS THINGS. TOO MUCH/TO LITTLE CALCIUM TO MUCH/LITTLE SODIUM, MAGNESIUM. SO ON AND SO FORTH. I WAS TOLD THEY ARE FROM DRINKING SODA. I WUIT SODA AND STILL GOT THEM.  I HAVE FOUND THAT CRANBERRY JUICE JUST A GLASS A DAY HELPS.

Be sure to check in with your VSG surgeon about your medical emergency. He/she may want you to cut back on the calcium intake.

The other issue may be your water intake. If you're trying to sweat off weight through exercise and restricting water just to get your scale number down, that's a very, very bad idea. Good for you with the exercising and with the weight loss, but never ever deliberately reduce your water (if that's what you're doing).

Be more concerned about your health than the scale. Your emergency could have turned out worse than it did.

psychoticparrot

This is an easy one.  The weight in the hospital could be due to many things - different scale, being weighed at a different time of day, etc.  Our weight fluctuates throughout the day, every day and different scales have different calibration.  

The weight "gain" is, as your husband says, from fluids in the hospital.  

No mystery here.  

As a frequent sufferer of stones, the only thing you can really do is keep hydrated.  Always.  It's not surprising to me that you felt yours after your race, since you likely got dehydrated during the run.