Don't forget that the 6 days is a reminder that sperm stays in the female body for about 6 days. Any sexual contact in between ovulation period will form something that has ears, eyes, etc.
ALSO..

If you want a baby girl, have
sex between 3 days before ovulation (21- 23rd) 

For a baby boy on the main ovulation day and 3 days after 24th.

MAJOR SIGNS THAT YOUR OVULATION HAS BEGAN...

You don't need a doctor, just relax. After 2 weeks you may feel the following:
1. Headache.
2. High body temperature.
3. Dizziness (feeling of tiredness and sleepiness).
4. Breast tenderness/ size increases just like when you are menstruating.
5. Increased sex drive.
6. Light cramps or pain on one side of the pelvis.
7. Abdominal bloating.
8. Heightened sense of smell, taste or vision (you eat more).
9. Vagina mucus becomes slippery (if you notice, put it in between fingers...it stretches like thick catarrh or snail mucus...colorless like egg white.