A friend of mine has not had her period for over three months. She tests every two weeks and the pregnancy results always come back negative. However, she is concerned that she might have a tubal pregnancy, which-from what I hear-are not shown on a pregnancy test-false readings. She hasn’t any signs or anything. However, she does not have insurance and does not want to go to the doctor or hospital unless if she has too-if she has a tubal pregnancy she knows this must be taken care of immediately since this is life-threatening. I neek to know the signs so she and I can be aware of them. Is there a gradual showing of symptoms or do they come at once? Also, how long after conception do these symptoms appear?