Hello Ms Green
welcome to HealthcareMagic
If you are sexually active and had unprotected sex then there are always chances of getting pregnant.You are experiencing the signs of pregnancy
missed period;tender breast;frequent urination
The best thing is to get a urine pregnancy test done at home with a kit available at local chemist or get it done at a pathology laboratory.The test report will give confirmation of pregnancy then you can decide on the further course of treatment by consulting a doctor.