Hi there,
My doctor recommended that we start solids at 4 months for both of my two kiddos. Perhaps your little one is hungry? We started with Gerber's Rice cereal and breastmilk first, and made it so it was really thin. More milky, but you knew there was cereal in the bowl. Gradually thicken it up over a period of days. As they get used to it, you can add pureed fruit and veggies (we started with veggies first, so they wouldn't get "hooked" on sweet tastes first) later.
You might ask your pediatrician's office - just call and ask a nurse. They'll help you, I bet.
Good luck!
T.