Funny you should mention pleurisy,as years ago I went to Dr,s with a pain (like I am getting now)(re post Becca,s link)
And he said pleurisy,didn,t give me anything at the time if my memory serves me right

obviously wasn,t as didn,t go back.
So just wonder if whatever was amiss then is the same problem now??
But it is very uncomfortable,just moves around sometimes in the breast/under breast/in ribs/shoulders. Sometimes just niggling/aching away, then other times sharp quick pains and sometimes feels like a stitch?
It vanished for ages just like everything else then comes back when your least expecting it.
If you are worried go to Dr,s I went lots of times and I,m at Dr,s next week and will mention it again,as it,s back.
KathS