P.M.
It's a good thing you didn't wean her.... all those antibodies and optimal nutrition she's been getting most likely helped her illnesses not be worse.
She just had TWO bouts of illness... let her be a baby! When infants and young toddlers get sick, they revert to their last level of coping - which is usually "I need my Mommy". Seems the main issue is overnight sleeping and naps.
Her napping once a day is normal for her age development. Overnight, unless you want to hear her cry herself to sleep while begging for Mommy to come for her... sleep with her on the floor in her room, or bring her to your bed and sleep.
Bed sharing and breastfeeding are the two most important decisions I made that changed the life of my child. Now my baby is 5 years old and ready for her own room - confident and happy, independent and curious - we are happy to see her make her own choices and be proud of herself that she did.