is a condition wherein the fertilised ovum does not get implanted in the uterus.The problem may be chromosomal abnormality of the fertilised ovum or any abnormality of the uterus.
Usually most of the women donot recognise a chemical pregnancy as the symptoms occur after implantation
of the ovum. Only a few have symptoms like nausea , vomiting
and increased blood flow and cramps during the periods.
To clear your doubt you can do a sreum beta hcg
which would tell you wether you were pregnant.
wishing you good luck.