Am i pregnant or not

Dec. 28 11am i take test and got a result negative.. But when i try my first pee in the morning dec. 29 5am i got a positive result.. Then dec. 30 11am i take another test and got a negative result... I'm a bit confuse now... My period should be on dec. 25 and until now i'm delayed and have some wierd feelings, exhausted,vomit,cravings,sore and tender breast..