It's about a week experiencing lower abdominal pains, breast tenderness since my last period which happened earlier last month. am i pregnant?

If you had sex since your last period, and missed 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 carefully. Wish you good health! If you do not wish to be pregnant, use contraception all the time, every time. Consider implanted contraceptive, or IUD.