Although I'm sure it varies, on average how long after temp drop does AF arrive?  I thought it was within a day or two but I could be wrong.  Saw my temp plummet today :( very concerned because I'm 11DPO, so I'm thinking my luteal phase wasn't quite long enough if AF arrives today/tomorrow.  I took my temp 4 different times (and used 2 different thermometers), so I really did fall way low today and I'm freaking out.