Wow, Beloved! I'll tell you what caused all that mucus: the soy-based infant formula which is crap!!!! Plus, those baby foods. Gerber's is CRAP!!!!! You must undo the damage you unintentionally done via ignorance. Please read our article on "Alternative Infant Formula Milk" and learn to make alternative formulas for your baby. You must also start making your own baby food. You must do these things to reverse the serious harm you've done to your baby. All wrong can be righted by doing the right thing. I would highly, highly, highly recommend you schedule a 1-hour health consultation (only $100) a.s.a.p. There's just so much that needs to be explained to you so that child can make a speedy recovery. Time here won't allow it, so a consultation is best!