Period 10 days late -not norm; pain in lower back, right ovary; had high pain in clit and left armpit; had sex two weeks ago- both first time partners

Knowing UR own body: Pain represents infection. It does not represent early pregnancy. If your dates are correct your sexual encounters were well after ovulation and could not have caused pregnancy. But, you have an STD or other form of infection and need to be seen and tested at your doctor's office. You may want to get a pregnancy test just to prove this is not pregnancy.

Need more info: You listed several symptoms that tell me you need to see your OB/GYN now and get checked out especially since you did not mention use of birth control.