So I got a positive OPK this morning but it's only cd 11!? I took clomid in the past and ovulated cd 18/19 somewhere around there. When I've tracked my cycle with bbt and OPK in the past without clomid etc I also ovulated around that time. Anyone have any insight or similar experiences? I'm just confused. Thanks everyone! I do plan to keep doing the OPK until around cd 20 or at least a temperature spike.