My OPK's are so frustrating!!!

I'm on my second cycle of Clomid and I'm not sure if I should bother using them or not. This time around I started testing on CD8, which was yesterday. I I use clearblue and got a "low" yesterday. Today I'm already at "peak". Seems a little early for that right? I think I'll test with a cheapie later today just to see. I only just took my last pill today so I shouldn't be ovulating this soon. What do you think?