Anyone had this happen to them or get worse with sup-surfing?

i seem to keep getting a form of minor concussion when I pull off heavy (even small but heavy waves) and get some air when I pull off the back of it and crash back in to the water, or caught in the wave as it tumbles and closes out.
ive been banned from all exercise the past 3 weeks and have to see a concussion clinic on Tuesday to see what's going on. Started about 5 months and just seems to be getting more frequent. Never any direct head knocks or contact, just impacts from crashing back in to the water or being spun around under the water from bigger waves