What can be the cause of ovarian pain?

Hello... I am in the process of 5 packs of Vibin mini tablets. From the very beginning, in the area of 5-6 tablets from each package, i.e. soon after weaning, I have small spotting lasting about 6 days. This time, however, my ovary hurts. It is not a continuous pain, but it appears from time to time. It is not prickly. I don't know if it has to do with lifting that I had to deal with yesterday or something else. I take the tablets regularly and if there is, for example, diarrhea, I immediately take the tablet from the replacement package. Should I worry? What could be the reason? I had intercourse with my boyfriend on Monday. Could it be ovulation despite taking regular pills? I will add that I do not take any other drugs, I do not drink any herbs, I do not eat citrus, I did not vomit. Only last Sunday I had one watery stool and it was about 5 hours after taking the pill but I still took a spare one.