Am I just hungry or is that movement down there?!

Seeing as its some 7 years since I was pregnant and my mind isn’t exactly functioning to its full potential, well I’m sure any pregnant woman will agree your brain seems to turn to mush! I can’t remember what I said nor did 30 minutes ago let alone 7 years ago! Most people seem to say they recognise movements earlier on their second pregnancy so I’m not 100% sure if this tickle/rumble is just sheer hunger as I seem to be starving ALL the time! Or it’s the little fella swimming around. As I’m now roughly 16 weeks pregnant I would have thought I would soon be starting to feel something soon.