When to start counting DPO

Question

DPO" /> I'm not sure when day 1 past ovulation occurs when using CM point out ovulation.

Answer

I use OPK tests so I know for sure which day I ovulated and use the next day as 1 dpo.

Answer

Do you have any other symptoms of ovulation? Like a cramp or pain or a headache? 
Are you tracking your cervix?