Constipation, i. b. s. Is it necessary.

I had constipation and I.b.s since last 6 months when had Bell's palsy paralysi. Since then neither i could go to toilet nor complete sleep . i used to wake arround 2 am in morning.my all 96 blood test and e.e.g test are good.only vitamin d test was not good. For that i have taken 16 vitamin d3 60000iu sachet once a week.Now I am taking lactic fiber,goldcal,prothiaden,petrol medicine. My sleep problem solve and but I only relief 50% in constipation. For 100% relief I had to take pan D medicine in morning. But I don't have gas problem. I have shown psychiatrist,gastro,neurologist only gastro medicine suit me. Only above mention  medicine suit me.other medicine not suit.I am  taking milk in morning empty stomach and at night. I have heard that milk cause gas empty stomach. Should I avoid milk in morning empty stomach. I don't take outside spice things and tea or coffee. Or should I go for whole abdomen CT scan . is it necessary.I am asking this on line because I could not say personally