Would my copper IUD have protected me though it is due to expire?

Hello doctor,

I wonder if you could help. A month back I had some intimate contact with a new partner. We did not have intercourse and he did not ejaculate but I was concerned about some pre-ejaculate getting near my vagina. I was on day three of my period. My cycle is normally 25 to 26 days long. I have a copper IUD. However, this is due to expire in two months. Because of this, I wanted to double up on protection. The morning after pill is not available where I live. Therefore I took four Jasmin combined pills 48 hours after the incident and then another four 12 hours later. Four days later I had five days of bleeding that mimicked my natural period exactly. My question now is two-fold, should my copper IUD have protected me anyway even though it is due to expire? And when should I expect a natural period again to confirm I am not pregnant following the withdrawal bleeding that I have had?

Thank you doctor,

So do you think it is likely that my period will be later than normal because of the Jasmin pill?

Thank you doctor,

Could I ask am I right in thinking I should be calculating my next period from the start of my withdrawal bleeding?

Thank you doctor,

In a lot of other things I have read, it says the withdrawal bleeding would change the date. My natural period would be due today. I have taken a pregnancy test and it is negative. I am really really concerned.