Hi Sue, I am so so sorry for your news. I understand how devastating losing a much wanted pregnancy feels. You will get lots of support from the women in here - please come in as often as you need.
Your new doctor sounds like a real gem - you need the support of a great gp - we all do. I am so glad that that has been sorted.
I have not had personal experience with assisted conception - I have had some professional experience though.
I was a little bit concerned at you being told that the problem is your 'old eggs'. I understand this is your fourth early pregnancy loss and that is significant however before just swallowing that your eggs are old you need to be referred to an ob. I know some of the women in another forum gave you some names of ob's in Melbourne that work with more 'mature mums'. I would highly highly advise you seek one of these ob's out. You need to have bloods, ultrasounds, exams and extensive history consideration and perhaps even laproscopic examination of your reproductive organs by a practitioner that has a good track record of dealing with women who have recurrent loss. Yep 40 is creeping up there and yes you have a higher risk of miscarriage because of your age - this is thought to be because the ovum are aging. I won't sugar coat that because it is true. Statistically older women lose more babies. The other side of that is that here are many women your age and older who have successful pregnancies and produce healthy babies. You don't have to look far in Belly Belly to see evidence of women a lot younger than you who have these losses also.
So, the problem may not necessarily be age. This is the conclusion that is jumped to simply because you are 40 - I am not saying it's not possible just that there may be other factors. It could be as simple as that these little eggs that have been fertilised just weren't 'right'. Or the sperm wasn't 'right'.
Please don't just think it's your age and that's that. See someone recommended and credible. He/she will go over you and Nigel with a fine toothed comb and then you will be able to deal with facts.
The good news is that you can conceive.
Again Sue I am so very sorry for your loss - my heart sank when Iread your post. Please know you will get through this. First thing Monday pick up the phone and cry and scream and have tantrums with receptionists until you get into see an ob. You will need a referral from your gp - maybe your new gp can help to pull some strings. Put it out there to the girls in here who have suffered recurrent loss of an ob in Melbourne. I am sure you will get some good recommendations.
I wish I could give you a hug - I will send one instead.

Lots and lots of love to you sweetie xoxoxox