How to know when it's time to have a baby?

Jessica
I am 20 years old at the age of 17-18 I got pregnant but I miscarried and I ended up pregnant again at the age 19 and miscarried. I recently found out something I thought my whole life that I have pcos. I also do have a past of a few stds tbh. Which left scaring in my left tube and I have to have surgery to remove it. But lately I have been having mad baby fever. I have a baby cousin / goddaughter and I am my most happiest with her. I feel so motherly. I am in college but my heart really wants my own child. I just don't know when I should try.