From a less "medical" point of view, I consulted a naturopath about my losses (miscarriage x 1, chemical x 1), and started a strictly gluten and dairy free diet for a few months. I concentrated on nutrient density in diet so for example, instead of replacing a wheat based meal with a "GF" substitute, I'd go for vegetable and meat or fish based meal. Even for breakfast. I also started a whole food, organic multivitamin and fish oil daily. Stress reduction techniques, a solid 9 hours sleep at night (whenever possible). A whole "lifestyle overhaul".
Anyway after about 3-4 months of this I felt better than ever (previously having suffered allergies, asthma, random aches and pains, exhaustion and more), we conceived and are now 6 months along in a normal, uneventful pregnancy. I've also been able to quit the restrictive diet with no ill effects.
All the best, I know how hard it is the "not knowing" and I hope you find a path that works for you x
Oh! Edit to add, I also took Vitex (chasteberry tree) for the first trimester for progesterone support