If you have had sex, you may be pregnant. Even if you used birth control, no contraception is 100% effective. Missing your period is a common sign of pregnancy. Other common signs of pregnancy might include tender or swollen breasts, nausea, fatigue, and increased urination.
Some other less obvious signs may be moodiness, bloating, light spotting, cramping, and food aversion or cravings. Schedule an appointment for a lab quality pregnancy test that a medical professional will perform for you at no cost.