Hello, Thanks for using Healthcaremagic. i had gone through the data you have posted.
chest pain in 70 yr female the differential diagnosis would be
1)GERD: gastro esophangeal refulx disease: here chest pain would be burming sensation, may be more at night.
treatment would be to avoid spicy foods, keep head end raised and use PPI
like tab.
pantocid L which is a combination of PPI with prokinetic.
2) chestpain localised to one sid and increases with
cough and deep breathing i suggestive of pleuritic pain seen with
lung infection like
pneumonia.
CXR may be necessary and treatment would be antibiotics
3)chestpain more central, associated with breathlessness, swelling of legs
suggesive of cardiac
4)Muscuoskeletal: pain during some positions. take combination pain killer for 2 days like aceclofenac+thiocolchiside if renal parameters are normal..
as you have said cxr, ecg and 2decho are normal take a pain killer along with pantocid L.
hope this helps..