Crying like an idiot

Hi all. Im 6 weeks pregnant and i had to miss a close friends 30th last night coz i didnt want anybody to suspect why i wouldnt b drinking. Now im after seeing all the lovely pics on facebook and i cant stop crying coz im going mad i wasmt able to join the celebrations. Is this uncontrollable crying a part of pregnancy hormones or am i just an absolute idiot??? I was fine lasy night until i saw the pictures just now. xxx