Mom isn’t answering her phone, I’m very worries

My mom has cancer since September of last year. Last time I talk to my mom was on her birthday. A week in a half ago. We’re blessed that mom got to see her 65th birthday and heard from my brother and I (both her kids). Tried calling her Christmas Day but no answer. Called all last week. Not everyday but some days. I hope nothing bad happened and I hope she’s okay. Hope she isn’t in the hospital again.
I’m staying positive and going to keep positive.
Probably busy. She doesn’t always answer her phone and we do give her space. Just gotta keep trying. Prayers continue 🙏🏾🙏🏾
Edit: I forgot to mentioned that we flew out in October to go visit her for a week. She lives out of state. Gotta ask other relatives or emergency place.