Voltaren pain killer contains diclofenac
It can cause damage to the inner lining of esophagus
( food pipe ) and stomach.
Your feeling of something stuck in throat could be due to esophagitis
You may need to take drugs that prevent backflow of stomach contents to esophagus.
Also avoid/reduce spicy food and coffee/cola/tea.
Keeping the head end of you bed slightly high and avoiding tight dresses can also help.
What is your age? Do you smoke ? Was your pleurisy
I would suggest you consult a gastroenterologist
near to you who can do a OGDscopy and see the exact situation in your stomach and esophagus.
Also ensure that you mention the history of pleurisy and show the x-ray to him , so that he can decide if you require any further evaluation