So confused!

Hey everyone. First time taking these things so I don’t know much about them, just looking for opinions. This app originally predicted my ovulation date to be yesterday. I took my first ovulation test Monday morning and it was dark but not as dark as the control line. Took another one Tuesday and it was a shade lighter. Took another yesterday and it was even lighter. Now today’s is darker then yesterday’s. CM hasn’t really changed much that I’ve noticed tbh. But I did have slight cramping Wednesday evening. After entering all this in the app it now predicts my ovulation date to be Monday!! Ugh. As someone who is actively TTC this is becoming slightly frustrating. Do y’all think it’s possible I ovulated last weekend? Or do you think it will be Monday like they predict? Anybody else use Medecare brand(dollar store) ovu test? Help me sort this out in my head please!! Lol