do u ovulate 20 days after ur period?

It is possible. Some women ovulate more than once. It is an individual thing though. Get a book on Natural family planning and they are very detailed.

usually its that you count the first day of your period to 10 days. and the 10 day should be around ovulation

actually it's 12-14 days from the first day of your period, depending on your cycle. some women ovulate earlier, some later. chart your cycles using one of the charting things you can find online to make it easier and pay attention to your body... the cramping , the cm that you get during that time. It could be possible that you are "O" later or that you just haven't gotten pregnant yet during that "perfect time." KWIM. Good luck.

If you are trying to concieve maybe try to use the ovulation prediction test sticks to make sure that you are infact ovulated. There are some months that women can have a period but never ovulated. A women with a typical 28 day cycle will ovulate on day 14, day 1 being the day that her period started. GL concieving

It's possible. I never ovulate that late though, I always ovulate on day 10 of my 29 day cycle.

Yes, everyone is different, and while it's "typical" to ovulate around day 14 it is possible that you ovulate later. Have sex every other day all month long and see if that helps.

Every woman is different. I've never had a *regular* cycle in my life (as in coming at a predictable interval). Since I've started charting, the latest in my cycle that I have ovulated was day 28 with the earliest being day 14. Pick up a copy of "Taking Charge of Your Fertility" by Toni Weschler. Once you learn how to chart your temps and check your cervical fluid and position, you'll be able to pinpoint the day you ovulated and know what day your period is going to start. AF always comes 13 DPO for me. AND you'll never have to use a HPT again; 18 DPO and you know you're pregnant.