Hey ladies, so AF is due tomorrow 10/23. I have been having dizziness off & on all day. Some serious low back pain.  Light cramping off & on the last couple of days but none today. Then earlier today had very little brownish discharge once when using the restroom, nothing since.. I want to take a test but the only one I have on hand is first response "rapid result." Not early detection.. States to use it the first day of missed period. I just don't want to waste it if it's too early!? I'm driving myself crazy, but something keeps telling me to test.. Anyone else use the same test early before? Thanks in advance! Baby dust to all!!