Hi, function cyst is most commonly seen in women of reproductive age group. But 5 cm is on the larger side of normal variant. I wont attribute the cyst to ectopic pregnancy
, if your scan shows it to be an ovarian cyst
only. Cyst can develop with in a month also, it is not necessary that your previous scan should have shown cyst.
Most likely you will have your periods within a week of stopping the medication. This medication is for treatment of cyst and not for being more fertile.
I would suggest you to get a follow up scan to see the reduction in size of the cyst or its disappearance. If it persists or increases in size, it needs further evaluation. If you are trying for conceiving, start taking folic acid
tablets 5 mg once daily till pregnancy.