Ouch! Wtf was that?!? Help please

About an hour ago exactly I felt a strong somewhat painful, shooting pain near my cervix/right on it couldn't pinpoint the pain but it soon turned into what felt like ehh...mini contractions? A hard contracting/releasing feeling lasted about 10 seconds. Af just ended 6/18 & my fertile week starts tomorrow. I just have no clue what this could be...