Implantation?? Information or pms

Laa
I am 7dpo So for 3days now I been having some consistency moderate cramps in my pelvis kinda like when I had round ligament pain when pregnant with my son due to uterus stretching . So I looked it up and since I am only a week away from af they said it could also be implantation never noticed this symptom with my 1St pregnancy ?! Also been sore tender to touch in the boob's for same amount of days it's all leading up to implantation cause usually on a normal cycle PMS -cramp come a day or two before AF . Hope I am going to test 12dpo & (22dpo which is 3days missed af if so . I want to know so bad lol my symptoms are so serial!! Hope all stays possitve happy ttcing