Syrinx acting up?

I have been decompressed since Jan. Of last year. With that I have on syrinx that is in both lumbar and thoracic region.
Lately, I have what I would describe as a kicked in the lower back feeling, accompanied with high anxiety and a shortness of breathe and some rapid heart beating.

----Has anyone else experienced this? And if so, what does it mean?

These symptoms remind me of dysautonomia - minus the back pain (?) a lot of us develop dysautonomia- especially POTS. Can cause heart palpitations, sweating, severe anxiety, syncope,and fatigue.

Also second the suggestion to put a call into NS.