welcome to HCM,
thanks for your consultation,.
the spotting you are having presently can be your regular period with decreased bleeding and it can as well be spotting after fertilization and during implantation
the cure to your confusion is a urine pregnancy
test, which will give a positive report by now , if there is conception.
following this test you must undergo an USG , better will be a transvaginal sonography
.this will further confirm the finding of the urine pregnancy test,.
wishing you all the best and good health.