I have the classic signs of pregnancy, yet had a negative home pregnancy test result. could it be a cyst or a ghost pregnancy?

Did you take the: Pregnancy test after missing your period? If not, you may have taken it too early. You can repeat in a week with a first morning void. Reasons for missed / late period include: an anovulatory cycle in which no egg is released, marked v or ^ in weight; eating disorder; over-exercising (endurance athletics), travel, significant illnesses, oral contraceptives ; other meds, illegal drug use, breast.