My doctor said i must ovulate at the end of my periods because all signs point to it she said it's rare but not impossible is this true?

Could be: Blood work would confirm ovulation. It is possible to ovulate earlier than the average person. This isn't bad, but could be key in helping you get pregnant. If you have a short time between periods, you may ovulate early. The most common period is every 25-35 days, with ovulation around day 14. Ask for blood work if you want to confirm when you ovulate.