Prenatal vitamins

Hey ladies I just found out I’m pregnant, my hcg levels is 60.47. I’m really nervous because I had a miscarriage in March. I really want to carry this term so should I get prenatal vitamins now? Or should I wait for my first prenatal appointment and have my doctor prescribe me it. I’m also experiencing light cramps that comes and goes and my boobs are starting to feel very sore are these normal?