Flat nipple

Brittney

I'm 3 days pp and my milk just came in heavy over night I have one flat nipple and this one breast hurts so bad I try to put baby on it as much as I can to try to get anything out but nothing after awhile he just gets fussy and I just switch to the other. What can I do to help with this problem one to relive the pain so my ducts won't become to clogged and second to get milk out of the one breast?