I am 7 weeks and 3 days pregnant, I woke up today and my breasts are not sore anymore should I be worried? My first pregnancy ended in miscarriage I went for an ultra sound at 14 weeks and found that the baby had stopped growing at 7 weeks so I am very worried it could happen again.

You are already worried, so go see your doctor and double check with them.

Breast sores and all pregnancy "signs" are not the same in all women, some have none of them, others vary by women.