First, you should listen to yourself say that the "only" change is your daughter getting a divorce and shutting you out...oh, that's all? No biggie.

Then you should to just what you're doing, ask for input, sort it out, get a little information and then...

Go see your doc. I hope you have a good PCP and lay your cards on the table. I think you're doing the right thing by doing a Barney Fife on it: Nip it, nip it, nip it in the bud!!