I know what you mean about early married life Sammy. DH and I bought a house and got married in 2013 the house was purchased very much with children in mind and it is kind of heart breaking walking past the room next to ours which is supposed to be (and one day will be!) the nursery. For now it is extra space for my shoes at least 
I've been taking low dose aspirin for a while, you just ask for baby aspirin at the chemist.
Re immune testing, my GP was amazing. I had quite a few of the level 1 blood tests at my surgery. I have Raynauds and my clinic wanted to rule out any clotting issues initially and then I went back after my failed cycles as my clinic had advised the MTHFR, Factor v leidon and factor ll prothrombin. There are so many tests out there and I know how overwhelming it is. I thought my head might explode at one point thinking about it all.
I think you're in a similar position to me in that all tests have come back fine but two good quality blasts haven't taken. My clinic were keen for me to have another frozen transfer and said that we'd just been unlucky but I couldn't accept that, hence implantation/immunes testing. Definitely see what your clinic /GP say and then take it from there.
I don't think I'll be getting started properly until late April/early May because I have to take bcp for 2-3 weeks when my next AF arrives so you won't be far behind me. I am worried about OHSS too but hopefully things will be better for both of us this time.
Banana, that sounds absolutely awful
postive that you are starting to get some physical closure and that you will be able to have the karyotyping done.
You're over half way now Lucie, I am shivering at the talk of sleeping with the window open, I'm still using my hot water bottle!