Cath- i would call the secretary of whoever you have been referred to. Make sure they have the referral and its not lost somewhere and see if they can give you the appt date/speed it up!
karyotyping on the NHS can take a awhile- my friend waited about 3 months for the result, I got mine privtely and it took about 2 weeks. May depend on where they send it to, wales may be quicker?!?
Im not an expert but they can do PGD for most things which is what we had and just means testing the genetics of them embryos.Or they can advise you to keep trying and hope you get a lucky normal one one day. It is very rare though hun- I beleiev most peoples test come back normal and you probably never know the reason for the miscarriages.
Your cons prob has his way of doing things too- he may try high dose progesterone support, some use HCG injections, others use clexane to thin the blood.
Personally- I am very impatient, and i had a "feeling' something was wrong so thats why we just sucked up the money and paid- BUT we had help from parents as it was pricey so I would do whatever you and your man are happy with.
But I would def call up your clinic and badger them- NHS is so flipping slow its so irritating!!xxxx