Calling all BBT experts

Morgan • I have a son born on Dec '15, another son who was born Sept ‘17, and an angel baby born into heaven Nov '14. 💓
Does it look like I might have a chance? My bbt has me worried because it's all over the place while most pregnant charts I see have nothing but increase and very little dipping. Also, I'm not sure if I ovulated  day 16 or 17 (glow says 16 but my temp was lower the next day?) so if someone could help me understand that, that would be great! It's only my first month bbting so all of this is still new to me lol