Cervical Mucus and Negative OPK ---- TMI

I stopped my birth control pill on July 18th. Had pretty heavy bleeding July 20-22. If that in fact was my period and not withdrawal bleeding from the birth control I should be ovulating today/tomorrow. However I have taken two OPK tests today and they were both negative. And I have been taking them for almost two weeks and none have been positive. I had a glob of brown colored slimy CM this morning. And then just had this. I've done a lot of reading and I know everyone is different but wanted some other input. 
Would you say that I'm ovulating? Is now the prime time?!