Pregnancy hormones and raging temper?

hiya i am 14 weeks and in the last week or so i have been over emotional crying and totally loosing my temper! i put myself in a posistion today where i was slapped across the face by a man because my temper got the better of me and i had a go at a man...he almost caused me to crash my car. i got out of my car and shouted at him which resulted in him slapping me...instead of hitting him back which is what i really wanted to do i got in my car and drove at him!! i dont know what came over me! i didnt hit him thank god but i was so angry i lost control and it scares the living daylights out of me. how can i control my temper? i had problems with my temper a very very long time ago and it hasnt been an issue for 5 yrs or so.will it pass oncew my hormones stop raging so much?