Feeling low

Hi all,

I am now as of today 11 days late. Had urine test done at doctors yesterday and today got the call to say negative. The doctor has now asked me to have bloods done so im in the process of booking these in. All hpt have come back negative except one with a faint line which could have possibly been an evap line. Im tired, emotional and constantly going to the toilet at night. I am besides myself and dont know what to think. I have started the folic acids just in case and daily vitamins but in the 17 years of my period history I have never been more than 2 days late. 

Has this ever happened to anyone only to find out they were pregnant? Any advice or experience shared would be appreciated. 

Thank you