Have Cat Questions? Ask a Cat Vet Online.
You may need to take a qtip or a warm rag (warmed with warm water) and stimulate her bowels by rubbing her bottom if you have not already done so.
If this does not provide some relief, you will want to see the vet tomorrow for a possible enema.
This is not normal for a kitten this age.
If you have more specific questions, feel free to ask. I fear that my answer is too broad. I would be happy to discuss this further with you.