I have had the same problem...I lost hair for about 4 months....I was scared because I have long blonde hair and I didnt want to loose it....or have to cut it...

Im happy to say....It has stopped....but so has the weightloss...its very slow now.so I do think it was because of faster than normal weightloss....
hang in there......it will let up....
I can actually see when I part my hair the new hair growing back......