Hi Belgen, Colm,
Good response Colm, I was thinking of saying something similar myself.
Given that it is a relatively new symptom, give it some time and attention.
Some of us, although few, have post coital headaches, but I would say that for the most part our other symptoms are predominant. Also POIS tends to start less "aggressively". For many it can be years before they relate the symptoms to intercourse / orgasm. Not all to be sure, and there is a group who have had POIS since their fist orgasm.
It's possible that there are parallel mechanisms at work, so part of which might work for us, especially those with post coital headaches COULD work for you, but as Colm says, let some more specialized doctors have a look first. And who knows, with any luck, they may just go away.
It could be one of those things that just the stress of thinking that they could come back may make matters worse.