breastfeeding

My daughter turned 6 months old on the 11th. Ever since she was born i have had trouble breastfeeding her. I bottle fed her 2 months for that and always had trouble with positioning still do because i can't position her right. Therefore i can't get a good latch she's being crying out of hunger and have a hard time going to sleep,staying asleep, because she's hungry and has being going hungry. I'm tired of seeing her like this i wish i would've stuck with bottle feeding. I don't know what else to do since she's six months and it might be too late to see a lacation consultant is it?