If I haven't truly exercised (even walked around the neighborhood in walking shoes, but chase after my 3 yr old daughter and my right ankle swells a little whenever I am on my feet more than 10 minutes. What is this? Granted, I could feel my heart skip a few beats tonight and it freaked me out (I supposedly grew up with tachycardia). So, I think my worries have the best of me. I am so tired most of the time (I am 32 yrs old being 5'3" and 115 lbs). I do drink a cup of coffee throughout the entire day (just keep reheating it, etc). I have been a little better lately on drinking some water (a few sips here and there). Blood not circulating properly?