period is normal might not equals to your ovulated. get yourself check if your ovulation is normal and if your husband sperm is healthy? that will give you and idea and peace of mind. it always happen when Ur mind is relax
Better seek profesional advice. Let see what they would say or discuss with them what next cause of action can be taken
Naturally, use opk and bbt to track your ovulation day. Medically, seek for proper check up
Try change sex position dear sister .. and control oily food