Had my baby on the 12th. Found feeding her easy after birth but now can't get her to latch onto my left breast. I try the nose to nipple but she doesn't open her mouth and just sucks on nothing. Have tried multiple positions. Am now so sore on that side I have to keep using my right instead. Also tried pumping that side and only get tiny drops and the pump is making my nipple solid and sore... Any tips?