I wish thermometers were all accurate would save a lot of confusion! What's your cervical fluid been like the past few days? I had a massive spike in mine a while ago which was obviously down to my thermometer but because I had loads of cervical fluid fertility friend didn't think I'd ovulated. I guess the only thing you can do is wait and see how your chart takes shape, and keep bd'ing as much as possible just in case.
I think I am, cervical fluid dried up a lot yesterday and had a temp rise this morning. The frustrating thing is ive run out of opks so couldn't test to check it was negative this morning.