Pregnancy loss, am I missing anything?

Hi! I am hoping to get some insight to see if anyone else has been through a similar journey.

My husband and I froze Embryos when I was 32, we had a great outcome, 9 PGT normal, day 5 euploid embryos. At 34, we decided to try naturally, then with clomid/ovidrel, then with embryo transfer:

Pregnancy History:

  • January - chemical pregnancy - unaided
  • May - pregnancy of unknown location using clomid and ovidrel. HCG kept going up but the pregnancy was not seen on ultrasound. Eventually started bleeding, had to have to D&C and injection of methotrexate to clear the pregnancy
  • October - chemical pregnancy
  • November - embryo transfer; embryo split and was pregnant with identical twins, at 11 weeks they lost their heartbeats

Testing:

  • Myself and husband have had genetic testing and we don't overlap on anything
  • July - Saline Sonogram - normal
  • July - HSG - left tube wouldn't fill
  • August - HSG - left tube was slow to fill, but ultimately did
  • February - Pregnancy tissue was tested - all genetically normal
  • February - Recurrent loss testing - all came back normal. Recurrent loss testing included:
    • NK and Activated T Cells/IL2r
    • PT and PTT
    • Anticardiolip Ab, IgA/G/M, Qn
    • Factor V Leiden Mutation
    • Factor II, DNA
    • MTHFR
    • Hemoglobin A1c
    • HIV Ab/p24 Ag with Reflex
    • HCV Antibody
    • Homocyst(e)ine
    • RPR
    • Thyroid Antibodies
    • HBsAg Screen
    • Venipuncture

Cycle Information:

  • Regular 27-29 day cycle
  • Easy period, no cramping or pain
  • always light
  • Lasts 3-4 days
  • I do have PCOS and I take Metformin 1000mg for it

Now I am down a rabbit hole, of what could be wrong. After reading about silent endo, wondering if this is something i should investigate further or if there is something else. Of course, i also know I might be searching for an answer that doesn't exist. Just having a hard time accepting this is all just "unlucky"