Gettin sick tired and sore boobs?

well i wasnt meant to get my period for a another week this was 2 weeks ago and it came early and lasted less days than normal. ive been having unprotected sex but we use the pull out method.. lately my boobs are sore and this mornin i woke up and vomited.. cud this be a sign dat im pregnant plus im always tired i slept 15 hours the other night bcs i was so tired and then thought id be grand catchin up on sleep but i was really tired comin up to 4pm in the day