Pregnant?

So ladies I haven't had anyone to freak out too or ask questions too so I'll talk to you guys. I am 40 days late i have taken 2 pregnancy tests and they have come out positive. I'm waiting to go to the doctor bc or paperwork and having to set up an appointment. Not that I want the tests to be wrong but is there a way that it can be a false positive ? 
And also before I took the test me and my husband had sex like 10 minutes before and i don't even know if that makes a difference lol 
It would be my first pregnancy so questions are all I have