Spotting? Implanting?! Ahh!

Currently either 8/9 DPO , around 3 & 5 DPO I felt strong pokes on my left side, very quick, very sudden, but very noticable. 
I haven't been trying to symptom spot becaus it's the worst. 
I haven't had any cramps or anything of the like, and last night after a normal and enjoyable BD, I went to wipe and there seemed to be very light brown within a light light light pink CM. This only lasted for that moment and I haven't seen anything since, I never spot, especially a week before my period. 
Has anyone ever experienced this before or am I just spotting and overthinking it!!!!! 

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