Sounds like it to me. I think a definite temp rise is the most certain way of telling whether you've ovulated or not, only downside of it being that you don't know until several days after the event so can't plan DTD around it or anything...! I never get proper EWCM -Usually watery rather than anything else, so I think you're ok from that pov. I haven't used OPKs myself, but my understanding is that the level is only raised for a few hours so you need to OPK several times per day around the time of ovulation (hence why I haven't bothered with these). Someone with more experience with them might be able to help more, though!