pill accident


ive been on birth control for awhile, me and my boyfriend had protected sex on the 11th and i took my birth control for like 2-3 days and then i lost my pack for over a week in a half. i found it and i was taking 3-4 pills a day because i didnt know what to do. i freaked out and took a test on the 25th it was negative. well my period still isn’t here so i took a test again on the 10th of december so (4 weeks after sex) and negative again. did i just mess my body up with to much birth control? help im so scared