Helping understand my charts after EC

For context, had an incident on day 7/30 days cycle.

Took emergency contraception on day 8 of my cycle.

I’m very worried about being pregnant, was trying to be safe but the condom snapped.

I understand that lh and bbt probably aren’t very helpful or reliable but read that is mainly for the temp spikes?

I’ve been tracking my bbt and lh progression since to try and see an insight into my cycle and to hopefully avoid pregnancy.

Can some one please offer some reassurance please..

Thank you