Ovarian reserve of 0.89 is quite low. If you've taken dhea for 3 months, repeat the
amh and antral follicle count on ultrasound.Also check if day 2fsh is high and if there's follicle formation on ultrasound. Have you tried ovulation induction? If there's no follicle with clomiphene/injections, you should consult an ivf specialist and consider donor egg