Friends lied.. what do i do..?

long story short, I messed up and didnt say something that i did. well now it came out. Ive been honest on all questions. but now the so called best friend is saying i dont deserve her friendship, well now i am getting harrasing text messages from other friends that were mutual friends saying im crazy, i need to go to a looney bin, and saying all this stuff about what ive lied about. Alot of it never was a lie. alot of it never was even true, now none of those friends want anything to do with me, they tell me to stay away but i keep getting messages from them. last nights text messages had me scared talking about how i lie about everything and im so messed up in the head that i believe my own lies... it was very unnessesary on things that were said to me. well now i believe that my brother had a part in saying alot of stuff to them that wasent true either... what do i do, should i just change my number and avoid them at all costs.. and as far as my brother goes, i was calm when i asked if anything might have been said, and automatically he changed and went balistic on why i would even ask? kinda like he was hiding something.. what do you reccomend