Feeling weird or hard stomach or stomach ache are not the signs of pregnancy
. The white discharge from vagina is suggestive of an infection that you might have contracted through sexual relations. However at the same time pregnancy can not be ruled out. Best would be to do a urine pregnancy test to rule out pregnancy. Secondly a visit to gynecologist is recommended to get tested for genital infection
. Condoms protect not only against pregnancy but also against sexually transmitted diseases.