What Causes Frequent Urination And Soreness In Breast?

hi me and my husband have been trying to get pregnant, my last period was 31/7/10 and we had unprotected sex after i had my period which was the 6/8/10, i have been peeing alot and i am feeling tired and i have a sore left breast feels really sensitive,could these be early signs of pregnancy and when is the best time to take a test?