Ovulating after miscarriage

Soooooo we are past our first period after miscarriage and we are officially ovulating. Saw doctor today and everything seemed great to start trying!!!!! So we are really gonna try again this month I’m so excited!!!!!!! I was told to call as soon as I got positive test so they could schedule blood work and monitor my hcg levels. Is this normal? Either way I’m ready for my rainbow baby so fingers crossed ladies!!!!!! My daughters keep asking me for a baby brother.