Hello Dr. Samuel. I am 23 years old and i had unprotected sex last month. My date of Periods is 26th but now its 30th. I normally have regular periods and now its 4 days late. I feel really tired and pain in legs. I also experienced few drops of light yellow discharge (but not too much). Plus i had high blood pressure yestarday (i dont have this high bp problem). I am really worried. Are these sings of pregnancy??