Your chart look very similar to mine!

I have very even temps too.. and just like you had 4 days of the same temp. Then the next two days went up a little(same temp both days) and I think I am Oing today.
I would keep using the OPk's... Just wondering if they are getting any darker? Mine were weird this cycle.. they would get daker then lighter then darker, then lighter.. then it went +.
As for cm you are not taking or using anything? For some reason I have been having lots of cm this cycle.. my first cycle of clomid I was soo dry.. the second not as bad and now this is my third. I am using preseed also, that might be something you would want to look in to.. I know that sperm don't live long if there is no CM. Ohh also I drink LOTS of water.. that could be another reason why I have a lot more cm this cycle.
Good luck! I hope you O soon!!
You can look at my charts if you like, just click the ticker!