Heartbroken & confused

I’m almost positive I’m having yet another chemical pregnancy & I’m angry about it. & hurt & just confused. Why?? This would be my 4th one!! I’ve had one every cycle since August 💔. Can anyone tell me why I’m having so many?

I’m testing early around 10-12DPO & I’ve gotten faint but visible lines & then when I test again 2 days later to see if it darkens it’s either barely there or completely negative. Same thing w/ this cycle. 10DPO vfl & then negative the next morning 😤 I realize I’m still early it just feels pointless. My back is hurting & it always hurts a few days before af. Due in 3 days