thanks for your query.
Residual cysts are not the same as corpus luteum
After stimulation with gonadotropins like Gonal F , there is multifollicular stimulation of the ovaries - that is instead of one egg, many eggs ( follicles ) mature simultaneously.
All of them do not rupture at ovulation, and some follicles give rise to residual cysts.
However, corpus luteum is the structure that supports a growing pregnancy
False positives with urine pregnancy tests
are common, not just with corpus luteal cyts, but also various other causes.
As you have been trying to conceive for seven years now, this is a precious pregnancy for you.
Please do not waste time, and consult a gynecologist, as if it is an early pregnancy, you definitely need proper guidance and medications.
I think it is definitely worthwhile, since residual cysts do not give false positive test, and with a positive test, you definitely need confirmation and ultrasound
at the earliest.