Get yourself some Voltaren gel. It used to be prescription but it's now OTC. It's a topical NSAID, and it does really well. I found it at Costco at a reasonable price for more than I'll probably use in a while.
I developed tennis elbow playing tug-of-war with the puppy after we got him, and one of the guys on this forum suggested it. I'd been dealing with tennis elbow for almost a month, and it went away in about 3-4 days with the gel.
Just put some on. Hoping for the best. Had wife take a pic - see bruising.