Hi welcome to healthcaremagic
Normal endometrial thickness is 3 to 4 mm.. but yours is 15mm.Amenorrhea
is the first sign of pregnancy
.. UPT ( urine pregnancy test ) is the test done to detect pregnancy.. it is an antigen-antibody test.. it will be positive minimum 3 days after conception...
then you can confirm the pregnancy by USG scanning.. at present you must wait till next periods to rule out pregnancy..