Implantation cramping? Tell me your opinion

Hello everyone, my only child Was born 9 years ago. When I got pregnant for her I implanted early and my only symptom was super exhaustion. Hubby and I are trying for baby number 2 and have used preseed the last couple cycles. I’m 6 dpo today. Here’s my question: yesterday I was extremely exhausted, backache and had cramping all day and prickling on my left side along with my boobs being sore. Today I had heavy exhaustion/irritability, backache and my uterus feel sore/full. My boobs are still sore as well. My CM has kicked up a lot since yesterday and I’ve also been having really vivid dreams the last 3 nights. Anyone ever had “implantation cramping” then their uterus just feel sore/full the next day and ended up being pregnant? Praying for our Miracle. TIA..