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If you are trying to get pregnant, you should have allowed your partner to have complete ejaculation. The pullout method is associated with highest failures and chances of pregnancy cannot be ruled out completely. Your symptoms of having sore breasts and tiredness could be early symptoms suggestive of pregnancy. Few women can experience symptoms as early as 24 hours post conception. However each pregnancy is different and the appearance of symptoms depends on how your body reacts to the changes in hormonal status. Wait and watch for your next periods. If you suspect to be pregnant, look out for development of any other symptoms suggestive of early pregnancy. Visit your doctor/gynecologist for further evaluation and assistance.
Take care.