I'm 11 weeks and smoked two puffs of a blunt

I feel horrible and guilty and worried. I smoked pot daily before I became pregnant but once I found out I stopped immediately. Yesterday My friend was smoking a blunt in my car and I took two small puffs and immediately regretted it. She smoked her entire pregnancy and has a healthy baby but I'm just worried. I know I shouldn't have done it or even let her smoke around me knowing I would be temptedĀ