Missed birth control

Saturday my boyfriend and I went on vacation and I forgot to bring my birth control. We had sex of course, and he did ejaculate in me. I returned home Sunday and doubled up on my pill. I was not ovulating. Yesterday and today I’m having hell stomach pains and my mom even scared me more because she called me this morning asking me was I pregnant 😫😫😫. Should I have taken a day after pill or some other backup medicine?