I'd be telling hubby off too!

DS was like this at 5m. Formula made it worse... but then, we found later he's intolerant of cow's milk (I was easily able to do both breast and formula, then after 2 months go back to breast only for DS's milk needs). He calmed down when we started solids, but I did have two weeks of clinginess and up all nightness before he just grabbed my apple and ate it. Slings didn't work for us at this point because it was just a food thing. If you have a plentiful supply it may not be a food issue though.