Have I missed my ovulation?

Glow says I'm meant to be ovulating Tuesday 10th (tomorrow)! However.. My bbt has increased the last 2 days but also I'm not sure if that's because I have a cold at the moment :(! Also my opk's are confusing me too! Yesterday I took one and although it doesn't exactly look positive because the second line is very VERY faint, it is still noticeable compared to the one I took today! It's showing more of a positive as I'm getting closer to my 'peak day'. I took a test this morning and it a definite negative. So have I missed my ovulation? If I have why did it come so early than expected?