Hi,
My son really struggled with constipation right after he started solids, and we tried every home-remedy in the book--grape juice, karo syrup etc, no bananas--just everything. Nothing helped.
The amount he suffered took an incredible toll on all of us. My husband and I would weep while he screamed and strained to poo after we gave him a suppository. Even the cat would run around screaming in response to his cries.
Then we took him to a pediatric gastroenterologist, and she put him on a laxative called "miralax", and it is a miracle. We still have to give him a suppository 1-2x a month, but he was just unable to go the bathroom on his own before at all.
Please go see a specialist, our regular pediatrician wasn't all that helpful.
Good Luck, R.