Hello~I would definitely see your GP, being on a type of blood thinner can lead to more bleeding, possibly even internal. The other two posters have given you great suggestions.
Due to your fall, you are at a higher risk for a DVT (deep vein thrombosis). The good news is that the Eloquis you are taking for your aFib and the Plavix for your stent significantly decrease your risk of blood clotting, but will not decrease the risk to zero. I would urge you to see your primary care provider or even visit an urgent care. If there is concern for a DVT, it can easily be ruled in or out with a venous duplex ultrasound. Ultrasound is both noninvasive and painless. Some x-rays may also be warranted. I would elevate your leg and continue icing it on and off. If you start experiencing any symptoms such as shortness of breath, chest pain, an irregular heartbeat, or feel faint, that is a true medical emergency and you should call 911. I would suggest you see your doctor tomorrow. I wish you a speedy recovery.
Sorry you were injured. Since you are on a blood thinner I would worry about that. Have you been tested lately for your coumadin level? Maybe you don't need to for Plavix. I think because of your condition, I would have the doctor take a look at it. As for the fluid it may be fluid collected due to injury rather than infection. It sort of sounds like it got blood in the top probably due to your blood thinner. Having had two blood clots myself , I always worry about that when someone gets a fall. Do you have a fever or any open wound from it? I would worry about bacteria getting in there and causing infection when you fell. I would probably ice it for the first few days. But if you can see the doctor I would have them take a look.