If i got pregnant days before my period was expected & then missed it, when can i take a first response pregnancy test?

You can do it now: You have already missed your period and you can do the first respond pregnancy test now and it should be positive.If negative repeat in a day or two if still negative in all probability you are not pregnant.

Now.: First response early result pregnancy test is reported to detect HCG up to 6 days prior to your anticipated period. So, taking it after missing your period, should be accurate.