This is an extent of a previous question, but if I fall pregnant and I had previously taken multiple drugs the night the child was conceived, will that most likely effect the child?

Yes. Most likely  your illegal multiple drug use will probably have a detrimental lifelong devastating health effect on your precious innocence child.

I see you reworded your question after I answered, my answer still remains the same and I add drugs can alter your child's mind, body, mental, physical and psychological well being for a lifetime and causing heartbreaking suffering and pain😳.

A mother’s use of drugs increases her child’s risk of mental retardation, physical abnormalities, and even behavioral disorders.