My husband and I have are trying to get pregnant

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We have been trying to get pregnant after I had a child that happened by rape that I gave up to a family that couldn't have kids because I didn't want the person that raped me come and destroy my husband and I happiness. We have been trying to have a child that is out of love and have been trying to get pregnant since May. How long does it take for someone that had a child to get pregnant again?