Surgery Wednesday, blood work question

so my surfery is in about 24 hours. I have to have repeat blood work Wednesday morning because my MCHC was a bit low at 32.6 with normal starting at 35. I know this isn't exceptionally low and believe it means I may have been slightly anemic?  If I'm remembering correctly I was on my period at that time, so not surprising as I do have menorrhagia. 

Just wondering if My thoughts are on target. Is this anything that could cause my surgery to be delayed?