Ovulating 6 days before AF???😰

Lo

Hi! I'm 31 y.o. 1st time ttc.

I stopped taking the BC pill on 7/5/17 and have been Ttc since then. 1st CD 7/5-7/12 2nd CD 8/9-8/13 next is expected to be 9/13.... seems like 35 day cycle. Last night I took 2 OPK & it's positive 6 days before I'm expected AF. CM is creamy White🙄

I know that it takes awhile for cycle to regulate after BC but has this happened to anyone?