Huge thanks (and hugs) to all who responded. TishaBuv, I'm so sorry to hear about your father. That was no doubt heartbreaking and I appreciate you sharing those experiences with me.
I'm pretty sure, in retrospect, that the issues I was having for the first six months or so after H #1's death were probably severe enough to qualify as PTSD. Nowadays, probably not (at least from a diagnostic standpoint). I still have traces of it at times. The reactions are similar, but they're much, much more muted now--if that makes sense. Triggers only cause me mild emotional discomfort at most, whereas in the past they would have sent me into a panic attack. There are still places and activities and trains of thought that I avoid because they remind me of him and therefore make me feel sad and preoccupied, but they don't put me over the edge. Far from it. The exception was the incident at the cabin in March that I mentioned in my first post and I think that happened mainly because my emotional state was already compromised by stress.
So in short, I'm still unsure whether I can label myself as having PTSD. I'm about to have to stop therapy temporarily because I'm moving (which is good--I'm pumped!) but will definitely bring up these points with my new T once I find one who's a good fit.
Thanks again everyone.