To improve my grammar

Please check if the following sentences are correct.
I found out that she is having a baby boy. I am so excited for them.
I found out that she was having a baby boy. I was so excited for them.
I found out that my daughter is not a virgin. When I asked her about it, she denies and says she is a virgin
I found out that my daughter was not a virgin. When I asked her about it, she denied and told me she was a virgin
I have found out that my daughter is not a virgin. When I asked her about it, she denied and told me she was a virgin
I did a pregnancy test and I am six months pregnant.
I did a pregnancy test and I was six months pregnant.
I did a pregnancy test and the result shows that I am six months pregnant.
I did a pregnancy test and the result showed I was six months pregnant