Dear Sister, I would suggest you and your husband perform the following things. Inshallah your true intentions will come true:

Remember, it should be performed not only by you, but your husband as well:

1. PERFORM UMRAH (preferably you and your husband both).

2. RECITE ASTAGFIRULLAH ABUNDANTLY. Becoz our bad deeds becomes barrier to our acceptance of duas. Astaghfirullah (meaning Allah forgive me) with true intention of Taubah, will not only erase your bad deeds / sin, but it will make your bad deed converted to good deed. Then when you pray and make dua, surely without any doubt Inshallah your prayers will be accepted and so will your dua.

3. HAVE GOOD AND POSITIVE INTENTIONS. Remember only Allah Subah-u-Wa'TaAala has power to bless with child. No other person (living or dead) has got power to do it.

4. Surely it is Allah Subah-u-Wa'TaAala who has the power to do all things, but at the same time, it is recommended to go to doctor and perform necessary treatments as desired (BOTH OF YOU). Surely it is Allah giving SHIFA (blessed cure) in the treatment, not the doctor or the medicine. They are only DARIYA (source) of giving SHIFA.

Inshallah you will be blessed with children. That is all I can suggest for you as of now. Thanks.