What Causes Hands, Feet, Lips And Facial Swelling?

So day one I woke up with swollen hands. Day two I woke up with not only swollen hands but swollen feet as well. Today is the third day and I woke up with lips/facial swelling along with the hands and feet. I can't think of anything new I've introduced to my body. But I read an article that connected Edema with Energy drinks, and I've been drinking those for a while. I am going to stop drinking those and see if it helps. I went to my Doctor and he seems baffled and ran blood and urine tests for kidney, liver and thyroid problems. All tests came back negative. Could it be the Lo-Carb Monster drinks or something else?