Hi!
If your wife was my patient, I would suggest that she see a reproductive endocrinologist. That type of doctor specializes in helping couples conceive and could help with irregular menstrual periods.
Good luck!
Dr B
It would be better for you if you contact with your personal doctor about your problem. Pregnancy complication is a common problem, but as your wife is not sure whether she is pregnant or not, then you can take a test and to solve your problem both of you can take the help of an endocrinologist.