Agree with @LittleDoveLove egg quality is key and so her recommendation of "it starts with an egg" by Rebecca Fett.
My background prior to having 2 successful pregnancies: loss at 5 months, ectopic (ruptured), miscarriage. Following the ectopic I was advised I needed to do ivf.
My last miscarriage was an ivf pregnancy using a "top grade" embryo. After that miscarriage we opted to test the viability of embryos going forward.
I was devastate to find that my stash of embryos (12) we're all abnormal and would have resulted in miscarriages, or the birth of babies that wouldn't have survived long.
I cannot say for certain that the book made a difference, but having followed the recommendations my egg quality definitely improved (went from 100% abnormal to 50%) despite me obviously getting older.
Progesterone, reflexology, acupuncture are all helpful (the latter for relaxation if nothing else) but will not improve egg quality.
Really wish you the best of luck. Infertility is awful.