I am sorry you are worrying. This sounds like obsessing to me, a form of OCD.
Do you have a therapist to help you figure this out?
They make meds to help with your anxieties.
I am not a doctor but the excessive worrying could be some hypo or even mania.
Either way it sounds awful.
How are you sleeping?
I say make an appointment with your pdoc for further investigation of this symptom.
sorry you are experiencing this.
((((HUGS))))
bizi

p.s. did your mother pass away?