Can corpus luteum or follicles be mistaken for ectopic in transvaginal ultrasound ? negative test , lower ride abdomenal pain , really anxious

Possible: That could happen, but with a negative pregnancy test the likelihood of an ectopic pregnancy goes way down.

Pregnancy tests are: Very accurate - if they are performed after the first day of the "missed" period. It is possible for a corpus luteum cyst or a follicle to be mistaken for an ectopic - which is why the ultrasound needs to look for cardiac activity.