4 weeks of having my bike

so its been about 4 weeks since i've owned my bicycle... everything has been great so fa except for one thing. i've been hearing some weird rattling sound when i shift to the highest gear in the rear. i think my need its chain cleaned out or lubed. i've ridden my bicycle all over the place and think its time to advantage of the free tune up provided by UC Cyclery. i just set up my appointment next friday before noon and will be getting my bicycle back that same day! hopefully everything will be good so i can attend several events!