I Got My Period May 20-24 And My Partner Came

i got my period may 20-24 and my partner came inside me on the 24th. I took plan B the next day (12 hours). Then I felt very fatigued and sore right after, and had BLEEDING (like a period) on the 29-30th for two days. My doctor told me to take a pregnancy test in a month.

Now, I am 3 days late. My (extemely accurate) period tracker says my next period was supposed to come on June 17th. I took two pregnancy tests on June 19 - both negative.

Is this an effect of plan B or am I pregnant?