If she's still active on Tumblr, then I would advise trying to message her there one last time. Tumblr is notorious for eating asks and fanmails, so there is a very real possibility she just didn't receive your messages at all. (Be wary of including links or ellipses in asks, as that raises the chance of it getting filtered)

Even if that were the case though, it doesn't even close to excuse a lack of communication on her end for this long, life troubles or not.