BBT v OPK

P
I am waiting until May to start ttc, but I wanted to start tracking my ovulation so that I am more prepared when we do start. This morning I got very frustrated. I ended bc Jan, and got af 28 days later. I started the clear blue advanced on the correct date. My first day was low fertility and every day was high since then. Today is day 14 and I got very nervous when I saw high again this morning instead of peak. I only started tracking my bbt this week and today, and it had gone down .4  from Saturday. When I got home from work I took the second OPK and it showed peak fertility ( woo hoo) . But now I'm confused because everything I read said your temp should spike and mine has actually gone down. Any thoughts?