At this point, follow eco23's guide to fishless cycling on what to look for, but if bacteria start to colonize, you'll see a reduction in ammo and some increase in nitrites. Generally it can cycle quicker in a smaller tank as the ammo is more concentrated, but it's a wait and see. If you can keep the 5.5 gal, then you'll need to either get janitorial grade ammonia or add some fish flakes to provide
the bacteria ammo.