I think the advice of the Mri is good to rule out anything else. But usually we have all had all those tests by now. My stabbing pains are shocking, they can literally knock me down. I take Bacolfen for them and zanaflex. Vicious and very scary I know. Front to back. Its hard for me not to belivie it is a heart attack. Women often have that type of sympton- but my heart checks out just fine so as usual it is RSD. Take care CZ