Hello there
Pregnancy is not only dependent on sex positions.
There are multiple factors that affect the fertility of couple.
Try to have relationship at midcycle ( 11-15 data after your 1st day of menses)
U can use a pillow below your buttocks while having Intercourse.
Ask your male partner not to withdraw immediately after ejaculation and stay in for few minutes
Next Steps
start folic acid 5 mg 1 tab daily
Health Tips
avoid stress and anxiiety
lifestyle modification
exercise regularly