Looking for women in a similar boat

I have no children. My husband and I have been trying to conceive since I was 33, and I'm 35 now. I've always been told I should have good fertility since my mom had me at 40, but I've had 5 miscarriages: 2 missed miscarriages (one D&C and one induced with misoprostol) and 3 chemical pregnancies. It's been about 8 months trying to conceive after the last miscarriage with no success. I've tried 3 rounds of Clomid and 2 rounds of Femara with no luck. I've been tested by a reproductive endocrinologist with no definitive reason found for the miscarriages, although there was some suspicision that I might have poor egg quality. I've tried every vitamin and supplement under the sun, have done accupuncture, and have tried progesterone supplementation. My husband and I don't want to go the IVF route, especially since they can't tell us with certainty why we're miscarrying. I'm just trying to figure out when we need to call it quits. This has been an exhausting 2 years and we're tired of putting our lives on hold. Just wondering if there are any women who have been in a similar boat and have been successful after all, or who made the decision to stop trying and what the deciding factor was.