box turtle still hibernating :/

so my box turtle, Whoopi, hibernates every year, usually starting in late fall, and wakes up on her own in the spring, usually about April. well, we're well into May, and despite me taking her outside and putting her in her pool, she goes right back to sleep once back in her tanks. even when i took her outside she immediately found a pile of leaves and burrowed under it. i even offered her a nightcrawler, her favorite food, and she ignored it to go back to sleep.

i should mention that April of last year she had a problem with an overgrown beak. took her to the vet and they shaved it down, and afterwards she was eating like normal.

i'm just worried because normally she's awake by now and has an insatiable appetite, and now i can't even keep her awake. any reason she might still want to sleep? do i need to take her to the vet? money is sort of tight right now and i don't want to have to do that unless it's an emergency.

when she is awake she's alert, and moving without issue. her eyes are bright. other than her wanting to sleep through this nice weather, she looks fine. but i'm still worried...