U can have a period thruout pregnancy. What makes u think u are preg?Not sure how to answer this lol . $ store has tests, just like the more expensive ones so get a couple to stop worrying. good luck which ever way u want to go!
If u use a otc pg test, it normally won't show a positive until after missing for a month or 2, of course everyone is different and there really isn't anything set in stone regarding test results on these tests. I would suggest if you've missed a complete month then you may want to do one then. You know your body better than anyone else! Loluck