I took a pregnancy test this morning and the results came back with 1 bold red line. The test that I took was from 'first response'. Does this mean I am pregnant?

FIRST RESPONSE Early. Result pregnancy test is reported to detect HCG up to 6 days prior to your anticipated period. 2 lines = pregnant ; 1 line = not pregnant.
One . One pink line in the results window indicates a negative test. If one line is bold and the other line is there yet faint, then that's a positive result. If you are unsure retest in the morning as soon as you wake up. If you are still unsure visit your doctor. Take care.