Honey Constipation Could Milk (vitamin D) And Cereal (honey Bunches Of Oats) If Eaten For A Whole Week..cause Constipation?

Could milk (vitamin D) and cereal (honey bunches of oats) if eaten for a whole week..cause constipation? - honey constipation

So I ate for a week since I left the hospital (after delivery) ... I thought it was (a nutritionist and has a b-fast/snack fast for me) .. But now I have a severe constipation ...
I've heard that constipation is very common after pregnancy .. .. but it was very bad that I thought it would take to the ER .. because it was excrutiating and uncomfortable!
do u think (milk or milk products in general) has something to do with it? thank you ...