This is an interesting question b/c i'm your age, and weight except i'm an inch or two taller. I recently went to see a cardiologist for chest pain
i have been having and i took an EKG which will tell you if you have any irregularities in your heart so that's what i would suggest. It looks like your BP is pretty high though which is another thing you might want to be checked out for.
Also when your exercising you need to make sure that your heart rate
isn't that close to your maximum heart rate, 185 is pretty high try to stay around 135-160 for aerobic exercise
which will effectively strengthen your heart as long as you do it for at least 30 min. Your resting heart rate is ok, it varies among people but it will get lower assuming you take up a regular exercise routine. Lastly, I'm not very sure about the arm pain
maybe that's another thing to discuss with a cardiologist. I have intense chest pain occasionally but never arm pain. The main thing is to definitely explain all this to a cardiologist and start exercising again (moderately of course).