Unprotected sex , on the pill but he came in me. Please help?

Anonymous
So today I had unprotected sex with my boyfriend it was all very intense and we got so carried away etc, he came inside me. I'm on the pill and often forget to take it like every 2 or 3 days.
What is the likely hood of pregnancy?
How soon to test ,
How soon will it's show a on a test
l advice taken aboard,
by the way he's 23 I'm 18
Please help me I'm so super scared thanks in advance xx
Updates
+1 y
Forgetting to take the pill was due to a sudden change in my work roster

Also if I don't take my pill I usually get a mini period type of thing but I haven't had that in 5 days which is odd

This happened the day before my fertile window started
Unprotected sex , on the pill but he came in me. Please help?
15 Opinion