Not really sure??????

Today Is CD 11 and I'm feeling very fatigued, feeling some cramping ( it's not like af cramps it's discomfort in my lower abdominal area and back ) and appetite is + . . ... i believe I ovulated on the 23 but not 100% sure... . I can't really go by my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> cuz it saying I'm supposed to start af tomorrow but she was just here on the 16-19 of Aug so not sure what's going on can anyone help