Thanks for the query. Ruptured ovarian cyst
can lead to internal bleeding
But usually that will not come out through the uterus and cervix.
The cause for your bleeding could be hormonal
imbalance, uterine causes like endometrial abnormalities, local causes like cervical erosion etc.
So if the spotting repeats better to consult gynecologist once, get examined.
If needed go for ultrasound
. By these the possible cause for your problem can be identified and treated.