Root canal of first moral teeth. It.

I just under went through root canal treatment for first moral teeth of left lower side and doctor did the POC ( permanant filling of cement ) today  and she told me that try to eat chewable things like roti n all slowly from that side .. I tried it today but whenever I  chew from that side I feel pressure pain ( like something is tipping on it ) kind ...doctor told me that it will take 3 - 4 days to recover it , once its get settled we will proceed with mountation of ceramic cap over it .. i feel pain only while eating rest time I dont feel pain... I am not taking any medicin for it and doctor also suggested me to not take it . I guess doctor has digged my teeth upto 17 mm and put those things till 17mm . Please confirm is that the common acceptable pain and will last long till next 3-4 days I have taken Ibugesic and moxikind tablets during root canal