The last four days of my 14 day luteal phase my temp dropped. period did not come, this morning (day 15) i had a ,5 celsius rise, what can this mean?

Hard to say: Temperature variation is believed to be the hallmark of the ovulate you cycle. You will find that your temperatures before ovulation fluctuate in a low range, and the temperatures after ovulation fluctuate in a higher range. The persistence of higher temperature could mean you have become pregnant. If you are late by 7-10 days, check a urine pregnancy test to confirm...