Hi there thanks for posting your query at HCM See dear it is too early to predict that you are pregnant or not When did you have last period and when is the next date only when you had a episode one missed period and you are almost one week over due . You get a urinary pregnancy test which if positive will tell about your pregnancy. As far as regarding your tiredness is confirmed I suggest that could be due to exhaustion See as far as missing the pills is concerned if you have missed pills for ne of two days it does not matter . You can resume the pill on the next day at the same time . BUT if it exceeds more than that , then you must wait for the next cycle and resume then . Along with the oral contraceptive you must use an additional barrier for birth control. .In unprotected intercourse you must take emergency contraception after consulting your gynecologist Hope you are satisfied Take care