Hey there,
With my number 2 pregnancy and my number 3 (which unfortunately was a blighted ovum) I had sore breasts straight away.
With number three (which was conceived 13 weeks ago) I knew I was ovulating on the sunday so TTC and within 2-3 days had sore breasts and I was pregnant!
We are trying again for a bub and I was ovulating on sunday last weekend and within the following week my breasts are sore again and I have a dull ache in my lower abdomen (like period pain) so we are crossing our fingers.
Alot of people have no symptoms. It may depend on how in tune with your body you are too I dont know.
Good luck hope you have some success!