What day have you ovulated taking Clomid 3-7?

Ch

my 5th round of 150mg and decided to try 3-7 Since 5-9 hadn't worked. I actually have ewcm for 1st time on cd11 so I think it's working better. Since Clomid I have 34day cycles. So do i ovulate on cd17? opks don't work for me but I have blood done on cd21 and It always says I ovulated but I'm wondering when lol