Great to hear that you are OK!
You may now have a valid reason for getting a PFO test (???). You may wish to consider doing so as, either way, the outcome will alter how you plan future dives.
Patent foramen ovale: Tests and diagnosis - MayoClinic.com
PFO is associated with sudden-onset severe neurological (brain/spinal) symptoms, inner ear DCS, and cutis marmorata. This dive series and symptom set do not raise the index of suspicion for PFO. If he's tested and found to have one (as about 30% of the population does), it's likely to be a true/true/unrelated event like FreeWillie described so well earlier.