4DPO mild lower abdomen pain

I'm only 4DPO and I feel like I have very mild AF symptoms. AF is expected 3/27 3/28 and I usually feel absolutely nothing besides agitation right before my AF. Never feel any cramps until it's the 1st or second FULL AF day. I don't feel adgitated I just feel my breast are a little swollen and very very mild lower abdominal pain. I'm wondering if this is a good sign or means nothing since I'm only 4DPO?