One- Like everything else these days, infertility is a speciality. She needs to be evaluated by a gynecologist who specializes in infertility. He should do a full work-up on her to identify any and all problems. A regular Gyn doesn't have the equipment to do all the necessary tests, and may waste your time, emotions and money on older tests that prove very little. You would be seen by a urologist, and after a full work-up on both of you. a diagnosis would be made.
If she is feeling that she might never be able to have kids again, then you are dealing with more than just jealousy on her part. Or she may be afraid that she will get pregnant again and have another tubal pregnancy! Without asking, you cannot know what is going on in her mind. In either case, speaking to an infertitlity specialist about these problems might help.