TTC after miscarriage

Hi all! So I am struggling somewhat and need some guidance or words of encouragement. I had a spontaneous miscarriage at about 6 weeks the end of April. It was very early I know, but my husband and I were soo excited. We already have a beautiful 3 year old little girl and I have wanted so much to give her a sibling. My doctor says these things happen sometimes and there is no way to know why, but it still doesn't take the pain or "what if" away. We are still currently trying and the constant negative pregnancy tests are really getting to me. I am beyond thankful for my little family now, but I would love for it to grow by two little feet❤