I had my first (two?) period(s) in October due to just getting off of Depo-Provera in July. The first time I bled was the 12th-15th then on the 17th-20th. Since I technically had two periods (there was a day of absolutely no blood whatsoever) which period do I count as my last? And since there was a day of no bleeding whatsoever, is it considered one period or two?