Question

My period showed this morning. The day I was planning on taking a pregnancy test. I for sure thought this was our month. I used opks and got a positive on cd15 of a 28 day normal cycle. I had (or thought I was experiencing) typical pregnancy symptoms a few days leading up to today. Needless to say I am disappointed and sad. However, we’re still new to this whole ttc thing as it’s only our 4th month trying. Anyways, my question is, since my cycles are normal and I know i ovulated and there are no clues leading me to believe I have any issues, is there anything my husband can do to boost our chances if there’s something wrong on his end? I know it takes longer for some coupes to conceive than others, but any advice would be greatly appreciated :)