I had a miscarriage,dates are off?

I had a miscarriage on March 12th, 2014. 
​My husband & I were devastated bc we wanted a baby so bad. I put my miscarriage on my calendar as a "period" from the first to the last day leading to its completion. 
​How will this affect my 'fertile' days & how do i properly compute an actual period or does that count as a period?