I took my 19 month old to our PCP because he was running a fever and throwing up.  I was told it was a GI bug and he needed to let it pass.  He hasn't thrown up (or really eaten) for 2 days.  Today he had milk for the first time and immediately threw up again.  Do I need to go back to the doctor for a second opinion or is this normal?  Also, he developed conjunctivitis AFTER leaving the pediatrician's office.  I have been using a compress.  Are there any other remedies.  Could these be related somehow?

Summarized question: What is the treatment for conjunctivitis?