Multiple swollen lymphnodes
are due to infection.It may cause fever
.You have to take antibiotic and anti inflammatory drug.It will take some time to subside.
Because of decreased immunity,you are having sores in your mouth.Take a B.Complex tablet.
If the stools are normal and blood is seen,it may be due to haemorrhoids(Piles).Please take plenty of liquids,high fiber diet and observe.
If the symptoms doesn't improve consult your surgeon and proceed accordingly.
Wish you speedy recovery