They recommend a supportive sports or maternity bra. I know mine are aching so bad they feel like they're on fire. I'm just 5 weeks along and have definitely noticed also. Also check with your doctor or primary care physician to see if it's safe for you and baby to take Tylenol and Advil.
Mine were like that in the beginning. Try putting a cold towel on your breast it helps them stop itching and burning.