Hi. I had a Medtronic micro pacemaker implanted 11days ago. Recovery went well and I was back to walking over a mile within days. About 4 days ago I noticed shortness of breath after mild exertion - walking less than 1/4 mile and heaviness in my legs. Had to pause after walking up 3 flights of stairs today. Facts. Age 74, stent implanted 6/29/17. Chronic arrythmia. On metoprolol 100 mg am, 50 mg pm, isosorbide, xeralto 20 mg, plaice and 81 mg aspirin. Thinking of going to meg emergency room. Thoughts?