If i lost a baby due to prematurity, will that affect my ability to have children in the future?

No - but higher risk: A history of a previous preterm birth increases risk for recurrence (around 25% chance depending on cause). There are some possible interventions to reduce recurrence risk depending on the cause of your preterm birth and loss. You should speak with your ob/gyn even before attempting a future pregnancy to see what interventions are possible in your case and to better prepare your for pregnancy.