Is this ovulation strip positive ?

My cheap OPK just came in the mail. I took the test and I believe it’s positive. Only thing is I had sex 4 days ago with husband. He’s a truck driver and won’t be home will the weekend. What are the chances of getting pregnant from last time having sex Friday and today is Tuesday. He did cum inside me. I also dipped one in water (bottom) just to be sure. Idk.