Post ovulation, what is normal?!

I am 4 or 5 DPO with sore boobs both yesterday and today still. Had dull aching lower back pain this morning. And had mild lower abdominal pain that feels like cramping on and off for the past couple days. I have had sore breasts before my period but never anything that has started this early (2 weeks before period due) . Is this just normal after ovulation that I just don't remember having or could it be pregnancy? I don't want to get my hopes up but it feels like I have a lot of symptoms that could mean implantation.?? Anyone else have this?!