Probably didn't ovulate, help please

Can someone help me? I'm charting for the first time. I thought I had ovulated on CD13, but I haven't had a thermal shift yet. I had a late night on CD15, and got sick in the middle of the night. So I think that messed up my bbt. I normally have a 29 day cycle. My CM has gone back to creamy and my cervix is becoming firm now. Does anyone think I probably didn't ovulate?