Stupid questions but i need to know?

my periods have been weird since i was 13, im 18 and the last time i was on was like the beging of this year and i had protected monday night, so its sunday morning and i feel sich and tired and i dont know but i was woundering if i could be pregnant? its a retarded question right_ i cant be huh? my chances are like one in a million, i wouldnt be mad cause i love kids and the thought of being a mom makes me happy be i can be right? it prolly the denny's i ate huh? lol this is worring me like crazy its 3:50 and im up askin this crazy question...(plz no judgement)