First you say she was stressed about the family get together on Sunday? Do you think she may have been stressed because you were leaving for the seminar?? She seems to miss you when she has space. She's making lots of contact when you're away. She's doing you favors by picking things up for your new business.
It seems you have both been running around busy since you got back. Do you know your W's LL?? Have any idea what it may be?? Could it be Quality Time?
I still see many positives..keep doing what your doing. Don;t make changes right now but really observe your W..watch for her reactions when you are home.