Help reading my BBT chart 😜

Can anyone tell me if/when I ovulated and why the big increase in temp? This is my first month temping. I had a LH surge test on CD 12 and a solid smiley face test on Clearblue advance on CD 13. I am CD 18 today so I may be 4-5 dpo but I have no clue. Also I know there isn't much chance of being pregnant this month because of husbands work schedule and not BDing enough but still want to understand how the charting works. Thanks for your help! 😊