Did you just match?? I matched last year and didn't get my contract for about 2 maybe 3 months later. So if you just matched I wouldn't worry too much, but if you matched last year, I might call you program and ask
Dude relax. The SF Match is a legal contract. Go get yourself a cold beer and celebrate.
"By signing your rank list you formally commit yourself to accept a position in any one of the programs you have listed. Both parties are bound by the results of the match."