I did a few things in the couple of weeks before I knew: took ibuprofen, drank beer (not much), can't remember about folic acid - I got through about 30 days' worth over the three months we were trying, and some of the not taking days were when I knew I wasn't. I've been good every day since I found out though, which makes me feel better. A bit. Nothing I can do now to alter what I did anyway.