My period is a week late but pregnancy tests are all negative. Sore breasts, bloating, constipation, abdominal & pelvic cramps. Should I go to a doctor or wait a bit longer?

Missed period? You probably missed your period because of not ovulating and your symptoms of the sore breasts and others due to unopposed elevated level of estrogen hormone level . You can repeat the pregnancy test in few days if you are in doubt.