Quoting Thorian's Mommy:" So LO was up all last night screaming and moaning. He really wanted to sleep but couldnt. Im pretty sure ... [snip!] ... thislong he has a huge blow out so im just waiting for itto happen. is there anything i can do with out feeding him solids????"
I would give him a suppository. We had to do that around 5 months with ours once or twice. You buy the pediatric ones and then break it in half for baby. Lube it up and slide it in... eek. I made my mother in law do it because I was scared. Baby didn't seem bothered by it at all shockingly. If still no poop, then you can do it again. That will be your quickest solution to solve your problem.
Then you can give an ounce of prune juice through a bottle (if yours takes one) each day until he's regular again.
This was our directions straight from the pediatrician.