Oo normal yan mommy, kahit may solid foods na at formula, kung breastfeeding pa rin especially gabi, ang body mo pa rin nakikita na may milk production kaya delayed ang period, this happened sa amin din and sa isa pang friend ko until we fully weaned na. But since medyo matagal na, better ask your OB just to be sure everything's okay, kasi sometimes may ibang factors din, pero sa karamihan ng cases it's really just the breastfeeding doing its thing!