I wouldn't sorry too much, yet, one missed pill is usually not enough to make you at risk for getting pregnant. Pulling out, however, while it may work for a while, eventually, you wll get pregnant. (Yes, I speak from experience.) = )
If you have had your regular monthly period and took the extra pill i very much doubt you are pregnant. I myself had the headaches you were having a week before my period and it came six days late. I have also been with my partner for 3 years and never used condoms but was on birth control and have never fell pregnant as long as i remember to take my pill at the right time everyday.
Also as for the pull out method just for a bit of info it doesn't work, my sister fell pregnant at a young age with her first child using the pullout method because she was scared to go on the pill if my parents found out, i really wouldn't recommend it. As long as you are both using protection or you alone taking your contraception when supposed to i don't think you should have a problem.
Hope this helps and i haven't blabbed on to much!!!