I'm Just About To Start My Second Trimester And I

I'm just about to start my second trimester and I smoked weed last week to help with the pain of my kidney stones since my doctor didn't give me any suggestions to help the pain and stress on my body. Now I have a doctors apoitment next week and can't have it show up in my urine test. Can I take shakes made to clean the system or will that hurt the baby