A strange recurring illness

over the course of the last few years, I get ill for 1-2 days every 4-6 weeks.  It's kind of like the flu--my hands start to shake, I get chills, I may run a fever, I may be incontinent at night, and I have to bundle up when I sleep.  I thought it was just me since I have a few chronic conditions.  However, I had to cancel a lunch some friend and notified them by e-mail.  When we got together agai, one of the guys, who also had WLS, said he has the same problem.  We had different type of surgeries.  I have mentioned this to my primary doc and he's stumped.  The strange thing this past week when it happened is that I had just had blood work done that morning.  But the workup was to check my INR levels for coumadin dosages.  That is, they weren't looking for anything else. 

I was just wondering if anyone else has had a similar experience.

 Wow  does sound odd ..   Have you asked your surgeon about  this?

  It almost sounds like low blood sugar spells ..  Were you a diabetic before WLS?   Sometimes RNY patients can develop "reactive hypoglycemia" after a few years out ..   I would get a blood glucose meeter and test yourself when you are having one of those spells, just to rule it out ..