Been breastfeeding for 5 1/2 months and I'm sure I must be lacking in something due to this that is making my nails presumably brittle. They break (clean breaks) really low down, along my finger tip. Bern happening last 6 weeks or so. Anyone got any ideas what I may be lacking in to cause this. Just so uncomfortable when they break so low, and annoyingly catch on clothes etc! Tia xxx