Sorry, just reread your post, and had missed the fact that you skipped a period. You are a bit young for menopause, so if you are normally regular, you may want to see your Dr. He can do bloodwork that will say for sure if its a pregnancy. Good luck.
It could be an early pregnancy symptom, or a bit of spotting prior to period. I often get that 2 days before my period is due. I doubt it has anything to do with your age. If your period doesn't show up on thursday try another home pregnancy test. Best of luck to you!!