implantation usually happens around 6 dpo to 12 dpo. how did you track ovulation? you might have ovulated earlier than you thought if you didn't confirm ovulation by USG, blood test or BBT. all those symptoms could be just progesterone symptoms. nevertheless, if you really did implanted around 10-11/12, you should be able to get a +ve UPT by now. try taking a test.
Hi sis, I have same experiences like you now and wonder how are you now? are you pregnant?