Low white blood cell count

Hoping I can get some insight on this. 

I took my 8-year old bengal to the vet this past weekend for what was diagnosed as some periodontal issues (pawing at her mouth after eating was the main reason I took her in). They gave me some antibiotics and pain meds, and we scheduled a visit for some work to be done - cleaning and possible extraction of two teeth - for this week. Today, they called me with her bloodwork results and said her white blood cells are significantly low. 

Here's the thing though - she's been acting totally normal lately. Very playful, eating and drinking normally, sleeping normally, etc. No vomiting or diarrhea, either. I'm not sure what - if anything - the white blood cell count indicates but if anyone has thoughts, I'd love to hear them. Worried about our kitty  

Anyone experienced anything like this? From my initial research, it looks like FIV and FeLV are possible, but those are both associated with other symptoms she's not showing. Is there any chance it's something she can fight through? 

One other thing I forgot to mention, both our cats our indoor kitties and have been for at least 6+ years. 

Has your vet arranged a follow up appointment to discuss further or run more tests / oportunity to talk when you take your cat in for her appointment today?

It is better not to immediately go in to panic mode about things like FIV and FeLV, not least because one of the many causes of low white blood cell counts can be stress.  Other reasons can include injuries or infections as the cells have to go to the area where they are needed and blood counts can show up as low.   While there is always the possibility your cat has a more serious infection or illness the blood count your vet has told you about may well not relate to these.   Indeed, as you say your cat is scheduled for surgery it is more likely it has some relationship to the condition you are going back to the vet for.

I hope you get more information when you see the vet, and that they are able to reasure you about her health.  Also that any necessary dental surgery goes well for her.