56 Days Since My Period

Kate
So i got my period August 23 and havent had it since, ive taken at home tests and they were negative so i went and had blood done last week and that was also negative...could i still be pregnant? I had a friend who had blood done 3 times over the summer and hers were all negative and at home tests were all negative. They thought she maybe had endometriosis and went in for a procedure and lo and behold she is 11 weeks pregnant, how common is this? Should i get my hopes up? Feeling very confused and upset? 😞
****got my period this morning ladies, thanks for all your thoughts, good luck!