double shit day !!

yesterday exactly i wake up at 6 a.m then take a bath as always , i put my mobile on the table near of the door bath room. suddenly my mobile rings, it got some missed call when i was take a bath.. i forgot why and how but i chase it so excessive so my mobile fall down.. then i panic, damn its turned off then i tried to turned it on but its nt work. i shocked, very shocked then i just left it take a bath again until i got to college but my mob still broken i didnt think its so important but mobile for me is not so important, at least i still alive without it but then after got class my friends named "A" asked me she wanna visit my dorm, i just said its ok then me and her walking together to take her into my dorm. she said she need to copy some data from her flashdisk to my laptop then i accept it bcause i actually hold all of data of almost lectures in my university..then after she got to my dorm i copied the data into her flashdisk, i didnt remember we talked alot until i realized suddenly my flashdisk disappears, yeah its very weird bcause in my room there is only me and her i remember i never move to other place but its disappear suddenly. then i shocked and then i searched it but no result i didnt find anything and i actually wonder and feel curious with my friends who only together in that time, she said no, i didnt know where is and its not in me.. and then i trust but now my questions is, did it possible suddenly flashdisk dissapear without reasons. i didnt know why, i didnt want to judge that she stole my flashdisk but my biggest question is where is my flashdisk going, i have searched for entire my room but i didnt find anything and the most weird things is its lost after i convert my data to her flashdisk its just between me and her did it and nobody else but why my flashdisk dissapear in my side, its actually not so valuable as its not expensive..!! but for me, its more than my mobile, i need that data bcause i didnt copy other data yet to my laptop and any flashdisk, i just so worry that now i really panic that what will i say to my lectures, i should spread thise data to all friends bcause its about results presentations of lectures, now i just know one things that i will never trust anyone.. its suck...!!