Sharp pain in lower abdomen ovulation? Or something else?

Katelyn
What could this sharp pain in my lower abdomen be? I had as recently on Monday. My period was last Thursday to Friday with some spotting on Saturday. It does say according to the Glow calendar that I have started my fertile period today but I don't know if the sperm would have lived this long. Could I be have pregnancy symptoms? Or is this just ovulation pain?