My boy won’t eat 😕

I’ve had my tarantula for 5 weeks now and this is week 3 of it not eating. I can’t tell if it’s just being a picky eater or on food strike or if I should be concerned of it being something else. He comes out at night/dawn and he’s been digging quite the tunnel in his cave. I feed him once every 5-7 days and the first couple times he ate the meal worm I fed him but has rejected food since then and I tried a small cricket last as my tarantula appears to be a juvenile. If anyone can help any advice is appreciated!