Pls, my menses is 10days late now.... I'm 24yrs old My last menses was 15/12/17 and it lasted for 3days....i have had 1 urine test and it was Negative... I also had a Blood PT today 25/1/18 and it still came out negative. Been having back ache, n tiredness never been
pregnant before so I don't know the symptoms. Please what could be wrong, I'm really worried