Hi, sorry I hadn't seen your messages till now. Ugh I'm sorry that you don't think the progression is going well 😔 I won't try to fob you off by saying "you never know till the blood test" because you already know that. I'll hope for the best but I understand you 😔
With regards what we did differently this time, I had an endometrial biopsy done after the 2nd transfer/chemical, and found that I had an infection called ureaplasma parvum (which I had had for years, it's part of my microbiome, but I think stress made it run amok), and we both had to take doxycycline and then I took vaginal probiotics (gynoflor, it also contains estriol). This time around they also started me on progesterone a week before the transfer, beforehand they put me on it after the transfer.
Regarding the HCG injections, those were the same as previous times, but here is the schedule: ovitrelle a week before transfer (day1), then a day and a half later started progesterone (day 3), then injection of choriomon (HCG) (day 4, day 7), then transfer on day 8, then HCG again day 10. I was on 400mg progesterone the whole time. I didn't have intralipids nor steroids (my biopsy came back "normal" for natural killer cells and I didn't have endometritis). I do have stage 4 endometriosis though.
To be honest I think the biggest different for me this time was the fact that I had taken the strong antibiotic and then the probiotic, I don't know why I think that but I do. Maybe the progesterone beforehand helped thicken the lining too, I'm not sure.
Maybe you can ask about an endometrial biopsy as well? I'm not actually sure what the names of the tests are but I think checking for chronic inflammation (endometritis) or any infections/bacteria out of whack could be a good avenue to go down! They didnt tell me to take aspirin but I've read a lot on Mumsnet that it's helped women (I'm actually having to take it now though), so it could be worth asking about?