@Oli125 , this will be one of the rare instances where I disagree with Pete. PFO is associated with sudden-onset severe neurological DCS, inner ear DCS, and cutis marmorata (type II skin bends). Your symptoms, especially the chest pain, dyspnea (difficulty breathing) and continued activity intolerance, do not suggest this. If you do have a PFO (and as you pointed out, 25-30% of the adult population does), it could very well be a red herring.
Another potential diagnosis here is pulmonary embolus, which can result from deep vein thrombosis and has been known to occur after a long plane flight. Symptoms from this could have theoretically improved with hyperbaric oxygen therapy. Given that the workup in the hospital in Bali was minimal, I personally would be uncomfortable sticking with the diagnosis of DCS. Other causes of your illness must be ruled out. I'm not saying that this is not DCS, but you need a more thorough workup, especially given your initial symptom presentation. I rarely take positions on SB that are this strong, but I recommend that you do this ASAP.
Best regards,
DDM