Should I feed more?

Hannah
Okay so I fed my 2 week old baby formula and finish 2 ounces at 5:30pm. As everyone know, feeding of formula should be 3-4hrs apart. My baby got relaxed and fallen asleep for about 30 mins after.. Then he started to fuss again at past 6pm giving signs that he's hungry. So my question is, should I feed him more?? I do not know what to do. This is my first baby. T_T