Hello, Thank you for your query. Stomach pains and pain while passing urine are not signs of pregnancy. It may occur in pregnant and non pregnant women. These are more likely the signs of urinary tract infection. Missing your period, however, is one of the signs of pregnancy. There are, of course, other causes like ovarian cysts, stress, illness, major lifestyle changes, sudden weight changes, travel, Thyroid hormonal imbalances I recommend : - a urine analysis along with a pregnancy test. -if pregnancy test is negative, repeat again in another week if no periods arrive. -if still negative and no periods, see you OBGYN to rule out ovarian cysts and other hormonal imbalances -if the urine shows signs of infection (increased pus cells and epithelial cells), depending on severity, you may need to take antibiotics after discussing with your physician. In the meantime stay well hydrated, avoid irritants like caffeine, sugary and carbonated drinks and spicy food. If you experience worsening abdominal pain or suddenly bleeding with unusual pain, fever, vomiting, visit the ER right away.. Hope this helps. Please let me know if there is anything else I can help you with. Wish you good health