Questions for believers?

Okay, so my parents raised me in church since I was 3. I stopped going when I got older, and just recently reached out to God I felt like my life was going down the wrong path. I started smoking cigarettes and pot. & hanging out with the wrong people. I had cut him out of my life completely and now that hes back in I think the devil might be attacking me spiritually. I walk down the street, or I'm just sitting on my porch and I notice cars going back and forth just watching me. I go into stores, and I can feel tension. I get dirty looks and my family keep telling me its all in my head, and I'm trying to stop this. Has anyone experienced this before? If so what did you do? Serious answers only please because I want my life back on track, and this is making it harder. Thank you.