First off, do you use the computer a lot? If so, the pain/inflamation may have been heightened by fishing.
Recently, I had terrible elbow pain in my left elbow. Bottom line was that it was the way I was sitting/typing on my computer. I changed that, along with medication and treatment, and am back in the saddle.
Try a 'medical' dose of Ibuprofen (advil) - three tables (600mg total). That's exactly what they gave me when I had some dental work done, to relieve inflamation. Also, try soaking your elbow in ice-water for 15 minutes, twice a day. I did both things, and in a 2-3 weeks, pretty much was back on track.
I also wore one of the tennis elbow braces on my forearm, which helped me not to irritate it any more.
Tex