Unprotected coitus and i-pill. I tk?

I am a woman with PCOs.Though within 2019-2022 , i have shed a considerable amount of weight from above 60kg to approximately 45 kg now.i have a height of around less than 5 ft.( I have not done any usg or pcos related test since a year and i never had the need or track my cycle) Its difficult to detect a missed period since i dont have a very regular periods.Though i have a couple of dates on records: 11Aug21 ,7 Sep 21 ,3rd Oct 21, 30th Nov 21(the December one isn't recorded)Then on 20th Jan22 and the last period on 18th Feb 22. During the second day of this last period 19th Feb 2022, that is on 19th February 2022, i had an accidental intercourse with my beau after 2 years. Also, i had an ECP (i-pill) within 4-5 hours of the happening.(last i had it back in March 2019). Also, my periods last 4 or max. 5 days but this time it existed frm 18th Feb 2022 to approx. 25 or 26th Feb 2022. When should I tk a preg.test and what tests shud i tk?i am in a huge anxiety. I