I stopped taking my birth control on the second day of period may 17th and had unprotected sex. whats chances being pregnant?

There is a chance of pregnancy, although it is relatively low since ovulation typically occurs around day 14 of the menstrual cycle.

When you stop taking birth control, it takes time for your body's natural hormone levels to adjust, and ovulation may not occur immediately. However, it is still possible to become pregnant during this transition period, especially if you have unprotected sex soon after stopping birth control.

To avoid unplanned pregnancy, it is recommended to use a backup method of contraception, such as condoms, until your menstrual cycle has stabilized and you have confirmed ovulation has not occurred. You can also consider using a pregnancy test to confirm whether or not you are pregnant.