Lisa is your Dr a GP or Pediatrician? As I would ask your local child & health nurse as many Drs & 'old school Pedi's' are not very up-to-date on what solids are best when. The Australian health nurses in each state are actually the best informed on issues for healthy children.
I say that as the info I have from when ds#1 was on solids from my early childhood nurse, suggests corn after 9mo & to hold off yogurt until 9mo (& other processed dairy eg cheese) if their is any history of family intolerance to dairy. Ie if you, your dh, siblings or parents have problems with dairy foods.