3 early miscarriage - Next steps?

[SunsetVibe]

Since I've started TTC I've had 1 chemical, 1 loss at 5.5w and now probably another loss at 5w as the hcg line was much fainter this morning. I'm so deflated.
Good news it means I am ovulating, however something is up. I'm on loads of fertility supplements to increase egg quality because I have low AMH (2-3) at nearly 37yo. I'm now suspecting the supplements are not doing much and egg quality is also low as the losses might be linked to chromosomal issues as I don't think it's progesterone issues...

So what should I do next?

I'm on the waiting list for IVF via NHS, but not sure how long it will take. I'm in a rush as I don't have much time with low AMH.
I just learned about PGT-A but don't think NHS does it. So would have to do IVF privately.

Is there anything else I could try/test first? I'm a bit lost, not sure who to ask for guidance on this.

So sorry to hear about your losses.

What testing have you had done already? Do you track your cycles (ie. To see if any abnormalities), what makes you think not progesterone?
I recommend vaginal microbiome test if you haven’t already, certain imbalances are linked to miscarriages, test is inexpensive and can be treated with antibiotics (and antibiotics can also benefit inflammation)