Progesterone levels in my boots :(

Kathryn
Anyone been in the same situation and gone one to conceive? 
Having fertility screen/blood work done by GP as we have been TTC baby #2 for 20 months. I had day 21 progesterone level done & it was 1.4 . My GP wasn't very helpful but I know having read lots of Internet stuff that the number isn't good at all. Can anyone shed any light on what might happen next? TIA :)