Is it blood pressure or the medicine that is causing excessive amounts of fluid on my legs? currently taking carvedilol, clonidine, and furosemide.

Both: The fluid may be a side effect of your heart working too hard to pump blood, which is hypertension, and the carvediol can also cause some swelling because it lowers your BP by dilating your arteries. The Furosemide is to help get rid of the fluid, no matter what the cause, so talk to your doctor, you may need a different dose.

Maybe medicines: These two blood pressure pills are not considered common causes of leg swelling/edema, thus you see your doctor to have further evaluation. There is "idiopathic edema" which basically means no known cause, but you need to find out known causes first. Compression stockings can help.