Help! First time charting

[Fluffypenguins8]

Hello ladies, I’ve just starting charting after six months unsuccessfully ttc. I was wondering whether someone could look at my chart and tell me whether you think there’s a possibility I ovulated earlier? I got a strong positive opk very early on cd17. Because I started getting a rise on cd18 I assumed I must have ovulated the same day.
The week prior I had a number of nights with disruptive sleep as my two year kept waking so not sure whether that’s why I had some higher temps.

[Juno231]

Have you attached a chart? Or if it's FF you can link directly to it. I'd be happy to take a look!