Supposed to start birth control pack on sunday after finishing previous pack,forgot but had sex and took two pills the next day.could i have ovulated?

Unlikely: It is possible, though unlikely that you ovulated. You could have taken morning after pill, however, taking two pills is likely to be helpful. If you miss your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine.