Aw thanks guys 
I know you are right and I've got fairly lucky with a pro-active consultant. He did say the fact is that I have in the past produced an egg what got fertilised, and OH has produced sperm what have fertilised, and most couples going into IVF don't even have those reassurances that on paper everything works...
I just need to get my head round it I think - beedle you hit the nail on the head with the failure thing, I think I suffer from failurephobia [must be the sales training in me, I've been conditioned for years that you either succeed or fail, and now I sound like a numpty off The Apprentice, I'm not like that honest!]
He talked through the different options but he said ultimately if there is anything wrong it will be with the tube, so the only treatment that gets round that is IVF which makes sense.
OH has been usual masculine voice of reason, he thinks we should at least get into the system before they change the rules again and exclude us for him having kids already, or me for being over the hill lol. He also had the incredibly helpful suggestion that I stop being such a grumpy cow in the mornings so we can SWI more 
Sorry am very memememe, normal service will resume shortly and I will return to I spy related humour and Brooking all over the place I promise x
I have self-medicated by necking nearly a full can of Stella Cidre it was the only alcohol in the fridge