Implantation cramping question

Adriana
Acouple of months ago I had this pain on 11dpo.Implation cramping & resuled in a chemical pregnancy.. Well 2 cycles later I'm having the same pain but it's a dull pain comes & goes started yesterday on 3dpo.. Today is 4dpo & it keeps on going & coming.. Not to strong but definitely noticeable... Anyone else ever experienced this feeling so soon.. It's only on the left side? Thanks in advance