Pill popping advice...

I'm 32 weeks and have been taking prenatal and a non sleep inducing pregnancy safe allergy pill every night. (My allergies are horrendous at night). I was diagnosed with mild anemia and was told to take an iron supplement every other day as well. Then I was told I could take Tylenol pm for my hip and back pain that won't let me sleep. I'm looking at 4-5 pills per night even though half of them are vitamins it still feels weird. What do you guys think? Are these all ok to take together. My doc has told me each of these things are okay but are they all okay, together?