Sore nipples?? Cause for concern??

I’m only like 4 DPO. So I know it has nothing to do with me possibly being pregnant. Around 2 DPO my nipples are really sore to touch.

I haven’t worn anything that would rub on them... it could be from when my husband and I BD and maybe he was a little nipple happy 🤷🏼‍♀️ idk.

Of course, I asked my trusty pal Google what it could be and it goes into kidney infection... I have been having some pain in the lower left portion of my back...

should I be concerned or see if it goes away in a couple days?