Clomid CD 3-7

So.. They changed the days I take Clomid from 5-9 to 3-7. I was camping this weekend and didn't have any OPKs with me but I had a lot of EWCM CD 12 and 13. CD 10 I took an opk and it was negative but the line was darker than the opk I took today (CD 14) for the poll I want to know what CD you ovulated if you took clomid 3-7? But also of you could comment do you think I ovulated somewhere between 10-13 since I already had the fertile mucus and the darker but not positive test?