The GP was pretty sympathetic and agreed it was time to refer, and said that because I'm fairly sure I'm ovulating, it might be time to look at more obscure things (tubes, Mr Spouse's sperm, and indeed factors that might cause recurrent miscarriage).
I asked him about the ibuprofen thing and he said he thought baby aspirin wasn't really recommended any more for anti-phospho-lipid people so I don't think I'll try self-prescribing that, though it's very tempting as I feel like I'm wasting what could be quite good fertility each month!
I also asked (which I forgot to write down, but remembered before I got there) about going private - he said since the wait wasn't that long (a month or two, and I believe him, as last time I was referred to a gynaecologist for something non-urgent, it took less time than that), it wasn't really worth it at this stage.
So we will see, and I will forge ahead with my plan of seducing Mr Spouse on a regular basis. Now, what can I have cooking in the oven "for at least half an hour" when he comes home tonight and goes upstairs to take off his work clothes? Well, the poor guy has to have some recompense for his next step, which is probably manipulation of his privates and production on demand of a sample...