I am 51 and had 2 positive home pregnancy test, what is my chance of being pregnant?

Low: Your pregnancy test may be detecting high levels of lh or lutenizing hormone that increases as you approach menopause. You should go and get an evlautation to see if your fsh level is high. If it is you are more than likely menopausal. If your doctor finds you are not, you can get a blood pregnancy test to make sure, but it would be extremely unlikely.