TTC 3 years and no luck, seeking advice.

My husband and I have been trying to conceive for about 3 year now, and I've had 2 miscarriages. I've been to my doctor and she said that I'm perfectly healthy and that the only thing abnormal was that my stress hormones were a little high. She recommended that I get a less stressful job to help that issue. My husband and I decided that I should stay home and go to school, just to get my mind off having a baby. I've done everything from yoga, putting a pillow under my butt after sex, macaroot supplements, etc. I just feel so lost and am heartbroken every time I get my period. Does anyone have any advice with conceiving and being successful?