Not preventing, not trying

I'm 19 years old. I've been on birth control since I was 14. I'm finishing this month and then stopping taking the pill. I have only about a week and a couple days left. I got pregnant once before because I messed up while taking it. That ended in miscarriage. Now I'm ready to have a child. So I'm stopping and we're not necessarily trying, but not preventing. So here we go! I'm terrified and excited and hopeful.