Tummy ache

I don't know what to do. My baby has got a tummy ache. He is wanting to eat like very 30-45 mins. It's like he doesn't have a stopping point. And he's had horrible gas and pooping like crazy. You can totally tell he doesn't feel good. He will scream and cry. What can I do? I have gas drops but it says for only infants 1month+ and he's only 1 week old. What do I do?????