my 3.5 month old has started to not latch on properly and my nipples are very sore! she doesn't seem to open her mouth wide anymore...she puts lips together as if she is using the bottle...she also has started wiggling around a bit more while feeding, which makes her come off a bit and again my nipples suffer. my husband gives her one expressed bottle a day so that I can get some extra sleep...do I have to give this bottle up to make her breastfeed better? I hope not.... any suggestions??