Had backache and Cramps around 4 dpo to 6dpo

6dpo had sharp pain in left uterus for 10-15 minutes

8dpo 9dpo & 10 dpo NO CRAMPS NO BACKACHE NO PELVIC PAIN NOTHING !!!! just feeling nauseous and super tired after those last cramps at 6dpo

Usually i start getting cramps around this time for my AF but this time i just had them uptil 6dpo and then nothing after that

did anyone else experience this and got a BFP later on ?