What Causes Mood Swings,constipation And Frequent Urination After Having Unsafe Sex?

HI, i m very confuse. I and my husband has unprotected sex during my fertilization period after ovulation continue for 1 week. after that i had several symptoms like mood swings, carving for food especially sour and pickels, feels really very tired and constipation, frequent urination almost @ duration of one hour, dizzenss. but all these symptoms appear before 2 weeks of expected period. so m y question is IS IT Possible to have early pregnancy sign before period and if yes then when should i test for pregnancy. i am confuse and excited too.. plzz do help. thanks you