This is the problem of the cost of treatment being a factor. In your case I wouldn't hesitate, but would go to a diving doctor (who in Britain isn't just a doctor who also happens to be a diver, but one specially trained and experienced in the medical issues to do with diving) and have all this out with him/her. I'm not remotely medically trained but I do have an interest in remaining alive, and it seems to me you may not be experiencing a stable problem that you can avoid or deal with as you feel fit (!), but it may be a developing condition that could become much worse. Perhaps any exercise could spark it off, such as running or cycling. As I said (suggested), in Britain cost wouldn't be a factor, but down here in Belize I'm already having to pick and choose which medical "conditions" I can afford to treat.