Ella one: Someone please respond

Hey everyone ive been trying to get an answer on a lot of forums and im going mad here!

Please someone help me with advice about ella one

My last period started aug 19, i had unprotected sex on 21 which is day 3 of my period. I took ella 9 hours after sex.

My periods are 26-28 days in the past year

I have had VERY weird symptoms, pressure in my ovaries, a feeling of arousal on and off without stimulation, pain in my vagina!

Im now on day 20 of my period and i am super anxious.

What are the chances of pregancy here? Should be very low considering i was still bleeding when i had sex right??

Has anyone taken this pill on their period? Pls share!!@