Help please

A.
8po did a test and faint faint line came up pic below test on bottom is pregnancy test top one is a ovulation test and the 9po negative tests and today I'm 10 dpo don't know wether to bother or not just want to know Brest are tender and backache is unbelievable bit of nausea and feeling tired cud just be pms with a false dodgy test help or advice please