Hey BP,
Locking you out of the email could just be a security measure since you have been gone for so long. When I was a Network Administrator we had a six month policy, unless we were told otherwise. Also, if someone would go on sabbatical I would lock their email until they returned. It keeps spammers from accessing through an inactive account. However, having said all that, I would definitely contact my boss and find out what is going on. Especially, since your insurance is involved in this whole mess. I've been on the other side of the coin (as a boss) also and when I wasn't kept informed by the employee as to the situation I would sometimes make assumptions that were not valid.
So my dear wench.....that would be what this deck swabber would do, I would certainly get a hold of the boss, supervisor, etc., or HR and find out what your status be...then if need be, Attorneys could follow.
Good Luck
RTD