He ejaculated outside of you and then put his penis into you. By doing so that would "squeeze" any semen, not precum but semen with sperm, out of his penis and into your vagina. There would be a risk of pregnancy.
But, if had sex 5 days ago (Sunday), then you'd be VERY unlikely to be pregnant. Timing wise, you'd be approaching your lowest fertility. It is is well past when you'd be expected to ovulate. The egg can only survive about 48 hours.
You can just be late. It happens. I strongly doubt you are pregnant.
Hope it helps.