So after swaying since last Octobre and 5 attemps BFN I had a blood check at my doctor and it turns out I'm severely Vit D deficient, 11ng/ml, norm is 20-70. Maybe that's a reason why I'm not conceiving.. Altough I know I was anemic in the beginning after a miscarriage and heavy bleeding last July from a surprise pregnancy, conceived with one attempt 3-4 days before O. HB was 9 afterwards and is 13 now and ok. B12 is normal, too.