Your toes barely rest on the ground when? When on the saddle or top tube? If it's on the saddle, then that's normal; you're not supposed to be able to get either foot flat on the ground if you're on the saddle. at 5'5", you probably should have gone with the size 50, but a size 52 still can work. If you have long arms and torso, then a 52 might even be the better choice, actually.