Did the chiro or PT give you an action plan to address the inflamed facet joints?
Are you over extended when sitting or laying down?
Are you sitting in an organized position?
Are you laying on your back?

You are ok for some time after the heat and adjustment because it address the symptoms not the cause of the problem. The issue shows up again because the cause of the issue is still present.
It is improved after going back to the chiro because the position is re set with the adjustment.

Taking time off let the issue start to heal, but the cause is still present which is why it showed up the morning after your 1st wod back.

If you are working on things and not seeing any change you need to re access the situation.
Pro Episode # 21 – Pro-User Request Friday: Not Seeing The Change? You Need a Systems Approach.

The lacrosse ball may be too hard for your body to relax.
I would recommend using a Yoga Tune Up ball
There are some quick fixes here  the low back/upper back and hip videos  hit things in another way.
A link to a free quick fix
Is there someone that you could talk w/ get help from with mobility work?