Lmp 28/12/19. ovulated 11/01/20. had sex a day before ovulation and a day after ovulation. mild cramps between 20 to 23/01/20. but saw my period on 29/01/2020. what might be the cause of not getting pregnant, and what can i do better this month.

Hard to know: If trying to get pregnant (presuming 28 day cycles), be sure to have sex twice a day starting from day 11-12, for six days. Be happy, enjoy life, and don't think about pregnancy too much. It will happen when it happens, and if 9 months go by with nothing happening, then ask the Ob-Gyn doctor for help. People start prenatal vitamins before pregnancy, to help prevent certain types of birth defects.