It's incredibly improbable. Honestly I don't think you have anything to worry about.
That being said the early pregnancy symptoms- such as sore breasts, headaches, mood swings, constipation, nausea, appetite change, and fatigue all can almost all be traced to pms, birth control side effects, under active thyroid, depression, and stress (this is also only the start of the list too). So really the best thing you can do is wait 2-3 weeks and take a pregnancy test with your first morning urine. Personally though, I think you're fine. But if your period is late, take a test.
the odds of being pregnant even if she didn't wash her hands are extremely slim. sperm doesn't survive long outside the body and even if a few were inside you does not mean they will absolutely reach your egg and fertilize it in time before they die.
thank you to both of you, i feel so stupid, i don't know the symptoms because i have been quite sick for the last couple months with another health problem, im having, but im waiting for my period, im just worrying, but its good to think about it all still thank you so much once again, i will buy a test its only been 8 days ago so i will tell you the results in a couple weeks thanks again