Rice cereal makes baby gy?

I started my 6 month old daughter on rice cereal a couple of days ago, homemade from organic short grain brown rice. She's not taken more than about a tabelspoon a day so far. I make it very liquidy because she wouldn't really take a "puree" yet. Now, she's very gy, and she's never really been "gy" before. She's waking up a lot at night just screaming and writhing until she can fart and go back to sleep. Her poop is otherwise normal (albeit more smelly) she's just gy. Is there something wrong, or is this a normal reaction to starting solids?