I am 43 and have not had a period since December 18, 2009. In the past week I have become very nauseated.?

I decided to take a home pregnancy test although I felt that it was very unlikely that I would be pregnant. I purchased an EPT +/- test yesterday and came home and took the test. The line in the control window came up properly and within in a minute or so a dot began to show up right above the negative line and then maybe one or two lighter dots. I am not sure why anything showed in the positive line area at all so I felt like maybe the test was defective and the package contained two test so I decided to test again this morning with the first morning urine feeling sure it would be a definite negative however a small line ( not complete to top, maybe have way or a little less) above the negative line and a small dot on the opposite side appeared on this test. There was nothing major however this test did show more than the test yesterday. Again I would like to state that nothing is below the negative sign and yesterday it was a dot and maybe one or two lighter dots and today a small incomplete line above the negative sign on the right and a lighter dot or two on the left sign, nothing below. Has anyone had this occur when they were testing and was it negative? Thanks for any help. I have two children, the oldest 25 and the younger 23...I feel as if this is maybe menopause.