It is not uncommon for women to experience breast changes during pregnancy. Swelling, pain, and extruded nipples are often early signs of pregnancy as hormonal changes occur. However, it is also important to note that every woman's experience can vary. In your case, the sudden resolution of symptoms does not necessarily indicate a miscarriage. Breast changes can fluctuate throughout pregnancy due to hormonal shifts. If you have any concerns or if other symptoms arise, it is always best to consult with your healthcare provider for further evaluation and guidance specific to your situation.