My last period was December 3,2017 usual my period comes on from the 1st-4th. Every 28 days. It hasn't come this month yet. Took a test today and it was NEGATIVE. My husband sperm count is low even after 3 months of clomid. Since December 17th we've been taking the one a day prenatal vitamins. And I've also been taking folic acid vitamins. Someone help any recommendations? Is it too early