Hello dear, I understand your concern. In my opinion the diagnosis of pregnancy is possible by urine pregnancy or blood pregnancy tests and ultrasound. So only the presence of symptoms of pregnancy like nausea,vomitings,increased urination,sore breasts might give suspicion of pregnancy but not confirm it. The confirmation is possible only by investigations . So I suggest you to consider doing a urine pregnancy test done . Once the test is positive then the causes for bleeding during pregnancy like abnormal pregnancy like ectopic or miscarriage,thyroid abnormalities, progesterone insufficiency or any bleeding from cervix should be evaluated. The ectopic pregnancy presents with severe pain abdomen with or without spotting and weak positive urine pregnancy test. The transvaginal ultrasound confirms the ectopic pregnancy. When the ectopic pregnancy ruptures it will lead to severe bleeding in the abdominal cavity.This blood irritates the diaphragm and lead to shoulder pain. But there are many other causes for shoulder pain other than ectopic. I suggest you to check if it is really pregnancy or not to confirm the things but not just assume things and feel stressed. So relax.Avoid stress. Hope this helps. Best regards...Dr.Srilatha