when should I start?

Eleni

so my fertile window started on Jan 5th.the app said that my Peak day would be on Jan 9th. but I always ovulate right after my period.this time at 5-6-7 I had a lot of discharge and many severe cramps on the right side.what day should I start counting as ovulation day?how many dpo am i?4 or 1?thank you!!!