Excessive folic acid

Hey Mamas.... Question. I am 4 weeks and 1 day today. The day I found out I was pregnant, I went to the docs for bloodwork. The doctor tested me for every vitamin known to man (just because...) and as it turns out, not one single lab value was out of normal range. Except for folic acid, my levels were "excessive"
Before the bloodwork that morning, I had taken a pre-natal vitamin. The doctor also didn't mention anything about my "excessive" folic acid levels, and the lab didn't trigger any abnormal flag for the results. 
Anyway, I've stopped taking the prenatal vitamins for the last day or two and have focused on eating healthy instead. 
Anyone else have this?  Or have any thoughts/insight?