I am 6 DPO and last night and have sore breast since last night. This morning I woke up a bit crampy. Nothing too bad, but I also feel bloated. I know these might be PMS symptoms, but it feels to early for that. AF is not due until the 21st. I was pregnant once before, sadly is ended in a D&C after a missed miscarriage. Back then I barely had symptoms because my HCG leves were too low. So I don't have much experience with this. Could it be implantation symptoms?