I have been on Lo Ovral birth control for the past four years and am usually very good about taking my pill at the same time each morning (although occasionally I have taken it an hour or two late). I have been sexually active with my boyfriend throughout this time. Yesterday I went to use the bathroom and had a small amount of light brown spotting, I then realized that I had forgotten to take my pill 2 and a half hours earlier. I took it then and the spotting stopped a few hours later. I felt concerned because this hasn't been a regular occurrence for me. Should I be concerned about pregnancy if I have been consistent with my birth control usage for so long? Could it be caused by stress? Am I worrying for no reason? Thanks!