It certainly looks fine. Tough to say without tasting it. Your description of bitter-sour sounds kind of bad. There's this one infection I'm most familiar with that seems to emphasize the bitter to the point where it's this harsh, really green taste. Hard to describe. But once you smell/taste it, you can smell it a mile away.
I'd wait a while and let it finish up and taste it them. Masondelux is right...if it's infected, ddon't try to talk yourself into the fact that it's good. But also be sure to give it enough time to make sure it's all done. Another good idea is to have someone impartial and honest taste it. I usually get my wife to taste it because she has no qualms about being perfectly...honest...when tasting my beer
(Actually the wife likes almost all of the beer we make, but if it's bad, she's not gonna lie about it).
But it really looks fine...like most any beer in the secondary. That color will lighten and look less orange when the yeast settles. Cheers!