Help please, diabetes question

So I’ve gotten my Hemoglobin A1c levels checked 3 months ago and yesterday as well. I’ve been pre diabetic for quite some time now, always a couple percentages below 5.7. Yet I still feel really tired, sometimes dizzy, I get itchy skin a lot and especially after I eat I just feel bleh, like I’m overly tired and a bit nauseous. I let my doctor know and he said he’d check my thyroids and do some more blood work but everything seems to be ok. At pretty normal ranges. So I’m just not sure what’s going on with me....what else could it be. I just hate feeling like this.