Hey Wacko... your body may be actually trying to tell you to avoid or limit sugar. I've cut out as many sugars as I can (without losing whatever is left of my freakin mind).
How? I use honey as a sweetener whenever possible/practical. I also avoid foods or food products with 'milk sugar' (lactose). It certainly turned things around for me.
That 'full' feeling you get after consuming sugar may be from bloating caused by the nasty bacteria.. or it could be that your body is signaling your brain that it doesn't have enuff of the right enzymes to process all of the sugar, so please stop eating...
I could be totally off the mark.. And what works for me applies just to me, okay? I just wondered if you noticed a downside to your sugar consumption 18 - 24 hours later... Or if that 'full' feeling later on turned into bloating, gas or other symptoms?