She is an old work colleague, and we stayed in touch after we both left the company. Met up once or twice a year, occasionally emailed in between (never phoned, always emails). So not really, really close friends, but we'd been through some very hard times together, and she was sort of like an old school friend in a way, we didn't need to see each other often in order to just pick up where we left off.
Last year I didn't hear from her on my birthday which was really unusual. I emailed her on hers, got no response, and then at Christmas again nothing. I then noticed that she was on WhatsApp, so I sent a quick hi asking if she'd changed her email address as I'd tried to get in touch. Her response was that she was having some health problems and would get in touch when she was feeling better.
It's now a year later, and well, I don't know what to do. I've heard nothing at all from her. I don't want to bother her but I'm now very worried that something awful might have happened and I just wouldn't have heard about it. I miss her.
WWYD?