Angel baby, now what?

Hi, my name is Emily, I am from Texas and I am 22 years old. I had my beautiful son Gabriel when I was just 16 years old, he was perfect, healthy, and beautiful.

At 6 and a half months old he passed away unexpectedly from SIDS. I was (and still am) heartbroken, he was my life, my everything. I tried getting pregnant after I lost him, trying anything to be happy again. I got pregnant 6 months later at 17, I lost the baby around a month and a half into the pregnancy. I was blindsided by it. I thought nothing like that could happen twice. I went on to lose my ex-fiancé to alcohol. Now it’s has been 4 years since my son’s death, I still am in a place where I feel like it was yesterday when he died. I am engaged to the most perfect person in the world.

He is wanting to have a baby, and we have tried a little bit, but he has a job where he is gone for weeks or months on end. I still love my son, is it wrong to have or want to have another baby? What should I do? I am terrified! Anyone in my situation?