Hello,
I would call your doctor or cardiologist first thing in the mornong and report your symptoms as your symptoms could be related to your heart. Often CHF (congestive heart failure) will cause a build-up of fluid, so it is important to rule-out.
Discontine and monitor all sodium (salt) in your diet as this causes water retention. Continue to elevate your legs above your heart this evening as much as possible.
Perhaps your dcotr will deterime that in addition to the Toprol XL, you may also require a diuretic (water pill) to help reduct the edema (swelling).
Here is some info, let me know if you have questions:
http://www.mayoclinic.com/health/atrial-fibrillation/DS00291
http://www.mayoclinic.com/health/heart-failure/DS00061
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