Can big girls run...........?

Im 14 and not overweight but OBESE and im not afraid to say that because i know the mistake ive made/Smh.But losing weight is a very slow process for me.Trust me when I was 10 I went to live w/ my dad and it was like I was in boot camp.I was exercising and playing and on a good schedule but still it took me 9 MONTHS just to lose 30 stupid pounds. =( But when I came back to live w/ my mom not only did I gain the weight back but I gained EVEN MORE weight.So great thing is..Im going back to live w/ my dad next months :) BUT Im homeschooled..And My dad said when I get out to his place im going to regular school until EVERYONE is out in june..WTF? Of course im scared because I havent been in school so long and Im obviously nervous and shy !! Ugh im so scared my stomach is hurting.But anyway Im in junior high and in J.H you have to run a mile about twice a week.Im a complete FAT *** and I havent been out the house in 2yrs so how in the HELL am I gonna run a mile twice a week? Thats the biggest part Im stressed about.So no I cant loose a whole bunch of weight in a week or anytime soon BUT..Can A big girl still RUN? Even though im a lard ***,Will I be okay with running if I practice on..You know,how to breathe when running and can I try to run now so that way i'll be use to it when I go to school?