Provera

Is anyone familiar with provera?? This has been my cycle this month. I have NEVER EVER EVER had 2 periods in 1 month. The first period was regular for me, 5 days and the second one I had was 5 days of DARK blood, and was never really heavy. I usually start my period 10 days after provera, however this cycle my period started at day 6. I am now(starting today) very bloated and constipated and am getting VVVVFL on FRER/ pregmate. I will keep testing to see if it gets darker, but is this even possible??