Betta Fish: Am I being paranoid?

I've had my betta for almost two months now, and he's always been super active, feisty, and swimming around. Int he past couple days, he has been super still and just seems to kinda float in different corners. First by the heater, now by his leaves. He wont even move when i gently tap the water around him. His gills are going normally (no increased work). Then other times he will move and swim around but it seems like the majority of his time is now just floating there.

He hasn't been eating great either. He was only eating bloodworms, so I tried fasting him to try and get him to eat other food. He wasn't having it, it had been almost a week, so I just fed him the bloodworm so he would eat something. That was 4 days ago, and he's refused even those since. Should I be concerned? Water parameters are fine. Is he just being lazy? Is he OK and I'm just being paranoid? Or is there something wrong?

Thank you!