Had my last period on the 18th march ,I normally get sore breasts a few days before
But I'm only due on the 18th April ,its sore on the sides and centre ,and I'm
Not on any contraceptive ,and we are trying to have a baby
I did a pregnancy test and it came out negative ,is it too early to tell

Some women will experience soreness around the time they ovulate once in awhile as well... that may be a possibility. Depending on when you tend to ovulate, it may be too early for testing. Best to wait until your period is due next and see what happens.