What Could Minor Chest Pain And Increased Heart Rate Indicate?

Good evening, Sir. . . My 91 year-old mother with hx of angina and taking beta blocker (toprol tartrate) for her rapid heart rate/ atrial fibrillation. She tells me ten minutes ago that she has been uncomfortable with minor chest pain since 5:30 p.m. as her heart is racing. Her pulse is 130 radially, and her pressure is strong, but there is no B/P cuff around. She has been walking about the house, non-diaphoretic, with good color. She tells me that she has taken an additional Toprol 25 mg. an hour ago, along with 5 mg. of Valium. Mom s normal dose of Toprol is 25 mg, three time a day, and Valium PRN. I asked to take her to a nearby E.R. for a checkup. . . but she says she has these spells often and it will go away. (She doesn t want to bother anyone on Easter this late at night.) Should I push her to go in to the E.R. ?