I temped until about my 5th or 6th week. There were at least two times, maybe more, where my temp dropped. I think it was by .4, but it may have been more. I also had some spotting early on so those were some very stressful days for me. I'm 23 weeks now so everything turned out OK. I think as long as they don't keep dropping you are fine. Personally, after the last drop I stopped temping. I just found it too nerve wracking. I do hope everything turns out OK for you and you go on to have a healthy and long pregnancy!