8dpo and having cramps...

Rebekah
So today I'm 8dpo and I'm feeling cramps in my abdomen almost AF type cramps. I have downloaded 2 apps one of which says I will start my period tomorrow which has. Even faithful in the past at predicting my AF but Glow says I shouldn't start untill the 28th. I also finished my first cycle of 50mg Clomid this month. Does anyone know what implantation could feel like and does Clomid lengthen your cycle cuz I'm anywhere from a 23 to 28 day cycle. Feeling discouraged cuz we've been ttc for over a year 😕