Re: Refusing breast :(
Is there any possibility of teething, ear infection, or other illness? If you suspect teething you can try switching up positions (mine often preferred to nurse more upright during teething), giving a cold washcloth or teething ring to chew on before nursing, and/or giving a dose of ibuprofen or acetaminophen. If there is any possibility of ear infection you will want to see a doctor straight away. Nursing is often uncomfortable during ear infections. Nursing in a more upright position can sometimes help relieve some of the pain until the infection is cleared. My son also nursed very poorly when he had a sore throat. If this might be a possible cause, see a doctor if you think it is necessary and again try switching up nursing positions. My son nursed best with us in a side lying position when he had a sore throat.
That said, babies can start getting very distracted around four months. Some things that helped me nurse through the distractibility were: wearing a nursing necklace, nursing in a sling or other carrier (I love my Ergo for this) while walking around - the motion helps calm my son, and nursing in a dark, distraction free space as happykaramom mentioned.
If you are uncomfortable due to the lack of nursing, then I might pump until the baby is nursing more frequently again. I'm thinking that it probably won't help matters if milk supply drops in the breast that is being completely refused.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).