Hello
First of all I want to explain you that fat globules , vegetable cells and starch ( undigested food in human) are normally present in stool with no concern.
Now according to you , you are having
low grade fever from last 2 months and took 4 course of antibiotics .
However all tests are normal including E S R .
In my opinion this type of fever low grade may be due to .
1 Tension or
anxiety as you yourself mentioned . So take care about.
2
Typhoid fever is another cause of such low grade fever , so get in blood for
Widal test as well serology test .
3 Although you don't have any
cough etc and above all E S R is normal so sometimes I have noted in my many patient that they suffer from " drug fever " i.e. fever due to antibiotics .
So whenever you feel temperature put ice pack over forehead and relax.
In my opinion deal as I mentioned.