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!!
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.