How to get a thicker lining??

R

I am taking 3 mg of estrogen pills three times a day, four estrogen patches every other day, and estrogen in oil IM shots twice a week and my lining is still only 5.6!!! I am also on Chinese herbal medicine, exercising, and taking regular vitamins plus CoQ10. I don’t know what else to do!! Has anyone else had this problem? How can I fix it?