Took first response HPT today. One line is dark and the other is a bit faint. I have a missed period of 7 days. Does this mean I'm pregnant.

Repeat it. If you are uncertain regarding the results of a urine pregnancy test it is best to repeat it the following day. If you are pregnant then hormone level will rise and the result will not be faint. If you are still unable to interpret the result then schedule a visit with your doctor for confirmation.