need some help

Nicole
So I have a 9 month old an recently I missed my period for going on for 7 days now I took a pregnancy test yesterday an it was negative.. I'm really bummed I want another baby so bad. Now that my period is late I'm getting so worried on what's going on, I'm afraid I'm unable to get pregnant again.. could somebody give me any ideas what's going on? I forgot to mention my boobs have been hurting an I've been craving some stuff but I'm not pregnant??