Anyone start having sugar issues AFTER surgery?

 Thanks guys, I think the idea about the swift change might be the culprit here!

Like last night I took my sugar before dinner and it was 72 and then took it when I started to feel funny and it was 140 (this was just 10 mins after I was done eating and just about 20 mins from the 72) by the two hour mark I was back down to 80. 

So I have to wonder if maybe what the other poster said has some merit. I am going to continue to monitor it all and see what the pattern tells me. 

Since surgery, I've become hypoglycemic even at 5 years out I still have 3-4 episodes a month, nothing serious but my sugar drops really low between 2.2 and 2.4. I get dizzy and feel very confused, hands shaky and go into a cold sweat... Sometimes even at night while i'm sleeping I wake up soaking wet, I mean dripping... 
I usually cut myself 2 good pieces of cheese, sit down for 5-10 minutes and it passes... that doesn't bother me very much...  But later I get an intense fatigue which I hate.  Worst culprit for the sugar drop is cereal with milk. Or sweets with milk...  Certain sweets also but not really sure why or which ones because I don't dump at all on sweets. 
A small side-effect that i've learned to live with.

I have passed out twice with it since surgery, but I've felt it get low many times. Shaky, weak, etc. It comes on fast for me. I have diabetes in my family and was borderline during my last pregnancy. I try to always keep something like crackers or fruit with me. When it happens I get something cold and sweet to drink and I eat a regular small meal as soon as I start to feel better. I've asked the Dr. about it and they've checked my sugar and tell me my levels are ok. It's scary!