What Causes Swelling And Discharge From Ears?

I have a blocked ear (left ear), with this I also have ear ache (not constant). I can feel swelling and have a continuous discharge from the ear (small amounts), the discharge looks clear when I whipe it, I used a Cue Tip to take a small swap of inside my ear (right at the openning) I didn t push it in but twisted, to take a sample of what the discharge is. The discharge (on the Cue Tip) looked like watery wax mixed with a little blood (orangey red mix). I am also suffering from lack of hearing in my ear.