I am 37 years old. Ever since I've had my daughter three years ago, I have been having very strange periods. Although it is still every 28 to 30 days and has never been painfull. I start spotting for about 2 to 3 days, then stop for a few days (2-4 days), then start for a furher 8-10 days. It is not heavy at all and dont really need to use s/towels. This throws my ovulation dates completely out of the window. I had to start my period on Friday (3 July) but missed, I did a pregnancy test the following day and it showed positive. Just to make sure I took one the next day aswell. My concern is that I started spotting yesterday (Sunday), it is light pink, and sometimes brown in colour. Is this the beginning of a miscariage?