I am 33. I have an 8 year old son. I am prone to cysts on my ovaries. I found out about my son early because the pregnancy had "turned them on" and i went to the er thinking cysts. I have recently taken plan b 3 weeks ago. for the past two weeks i have had naseua, cramping, light spotting, bleedin brown blood, pain...off and on..gas etc. and no positive hpt. I'm really scared i have a tubal pregnancy. Then I read that a corpus luteum cyst on the ovary in a normal pregnancy can give similiar symptons, how are the two alike and different.