Thank you for the query.
Your enlarged lymph
nodes should be definitely diagnosed as this is not a normal thing to have them enlarged in so many areas. Prednisone
and antibiotics (especially together) are quite strange therapy. Especially when you do not know what are you treating.
That is why I suggest you to have an ultrasound
of this lymph nodes and one of them should be removed for histopathology. Blood work with blood smear should be also done. Hematologist
consult might be necessary.
The pulsating lump in your abdomen can be an aneurysm
or if you are thin person, you may feel the pulse from aorta. This should be checked as well. Abdominal CT will be the best for its diagnose.
Hope this will help.