Haven't pooped for almost 5 days

Richie hasn't pooped yet for almost 5 days now.
Mommy has got rid of rice cereal and changed to oat cereal and Richie also likes it, so it's no problem.

So far Richie ate heinz pear pureed, gerber carrot pureed, mashed sweet potatoes (still can't swallow well), oat cereal porridge. But still after the last pooped where he ate sweet potatoes, nothing come out from his bowel. Yesterday mommy also gave him sweet orange juice diluted with water but nothing as well

Some suggest pear or apple juice. Mommy may give it to him later and see whether it works.
The worse case, see family doctor tomorrow.