help me! when did I/will I ovulate?

Here is my chart. I came off the pill in August and have had two periods since then. The issue is that I have 3 different apps telling me 3 different things. Glow thinks it was during my period...which I'm not so sure about. Ovia thinks it was last week, and Fertility Friend says today I am ovulating. I started taking OPKs and have yet to see a true positive...juat some dark lines. note: bbt may be off because I work 3rd shift and switch my sleep schedule on the weekends. any thoughts would be greatly appreciated.