Very low anti mullerian hormone (AMH)

I'm 37 & have two kids ages 6&8. TTC number 3 for 10 months now. Just saw a fertility specialist and all labs cane back totally normal EXCEPT the AMH which is a measure of your egg reserve?? Mine is 0.08 which is very low for my age. I'm freaking out and devastated and can't understand this. We did not even try to conceive our other two kids. Any one else have knowledge of this?