You're fine. Google the pro's and con's of chaning the oil at 3K like it's recommended and you'll see. One con being how expensive it gets. All you're doing is greasing the palms of the oil execs by changing your oil that quickly. It's actually kinda amazing how much life you can get out of an oil change.
tell ya what i do ,drain the oil ,buy som cheap oil ,run it in the motor for 20 min,this pulls all the carbon off,get it outa there change the filters and put the new oil in ,been doing it for 30 years works like a charm.