Lost a baby at 3 months. Is it to soon?

I took a drug called zofran to help with nausea while pregnant with my baby girl. She was born February 12,2015 and passed May 12,2015. She died from a severe heart defect called TAPVR. Her name was Adryann Saige. I just would love for everyone to meet my success story from glow. She was my second child. I also have an 5 year old boy named Trevor. My fiance and I are wanting to try again. But really scared. Is it to soon?