I was the same, was completely unexpacted and smoked and drank until the day I found out and then stopped both. I was about 6 wks when I found out.
Everything has been fine so far, Junior is gorwing well and Ive had no problems whatsoever. At the end of the day, theres not much you can do about it now, so theres no point beating yourself up over it, and you've done the best thing by stopping now.
Im sure all will be fine, but if you are worried then have a word with your MW
xxx