Drugs before i knew i was pregnant.

I found out i was pregnant at 7-8weeks once i found out i completely stopped. I was doing cocaine and smoking ciggarettes all the time. I would stay up all night, and sleep all day. Im so scared that something will be wrong with the baby since i did that while i was pregnant for 1-8 weeks. Has anyone had this happen to them before or know of a situation? Is the baby okay? Will the baby be okay? Ive been to the doctor mant times since i found out. Im 19 weeks now. But i dont recall my doctor say "he/she is healthy" or anything like that. Just hear babys heartbeat and seen baby on ultrasound. I just want to know what to expect? No matter what im 100% down for baby. I just want to know hes okay. And will he be okay. Also other peoples experiences or stories they know