i have had servere pain in my abdomal 4 ages now my stomach is swollen an i hav a big lump on the side of my stomach i am on fentenal patches an oramorph for the pain bt i have not reported the lump which as only come recently to my doctor they still dont know the cause of my pain they hav only done xrays should i demand further tests or just keep takin my pain releif and do nothing