which day is my first day of period?

[manee]

i had my D & C in this april and we are planning to get pregnant.normaly my gap between two continuos period is 28.and we bought ovulation calculator.but i got always negative result.so i m confuse about my first day of period.please help me.
i want to calculate my ovulaion day.so i want to know my first day of period.actualy ehat happen is when my period is going to srart on first day(as i count it as first day but i dont know its right or wrong) its alwyas very light brown discharge .so i can guess that after one day or two days i will get my period like bleeding.and for one or two days i have only light brown discharge and then its become dark as period.so which day is my first day of period.?on the day when i have first brown discharge or the day when i have realy bleeding(after two days of my brown discahrge).plese help me.

[bam1014]

I just bought an OPK and I thought it said to start testing on CD 7 or 8?  I have a 28 day cycle and if I tested on CD13, I would have missed my ovulation.  Just thought I would throw that out there.  You might want to start testing earlier to insure you aren't missing you're ovulation date, then when you  have a pretty firm grasp of it, you could narrow you're testing days down?

[Latrice414]

You would count the day when you actually start bleeding, not the days you spot. If you have a 28 day cycle, you might want to start using the ovulation test on day 13. The first day you bleed is considered CD1, so start testing on CD13 until you get a positive on the test, its best to take the test sometime after 10am, dont use first mourning urine, and take the test each day same time. Answer ovulation test(20day supply about 20 bucks) works pretty well. But you may want to monitor your cervical mucus and take your temps because it could be a possiblity you are not ovulatating