I am 54 years old with regualar monthy period now it came afater 2 weeks and is brown could this be menopause

You are the right age for menopause, maybe delayed a little, but we women are all different. You don't mention any other symptoms, so I am including a website listing all symptoms. Could be you should read up on them to make yourself aware of all possibilities.

34 Menopause Symptoms - Learn all about each menopausal symptom (http://www.34-menopause-symptoms.com)

There are a lot of symptoms but you may not experience all of them. I didn't, but sailed through starting at 50 or so, but still get hot flashes even now at 68. Good luck. It is a wonderful time of freedom for women in many ways !