Personally, I wouldn't take the fight. If I wasn't on a down phase of my training, it would be a different story, but you're currently on a down phase and really don't have enough time to crank the tempo back up high enough to be at your 'A' game for this fight.

If you can find some tape on the guy you'd be fighting and he's a total weed and you're really confident that you can take him, then I'd say go for it. Otherwise, I'd gear up for the next one after this one. I'm worried that you'd be risking injuring a muscle or something or just plain having a bad fight by going for this one so soon.