Am I pregnant?

Elle

So I came off the injection In December. I’ve been on it for years and come off it a few times. When I’m on it I have 0 periods. When I come off it my periods ALWAYS go back to normal (every 28 days lasting 5-7 days). I’ve been sexually active with my partner more or less every day since middle of January. I had my first period since the injection end of January which was normal and lasted 5 days. I’m now 5 days late on my period. I took a pregnancy test 2 days ago it was invalid, believe it or not I threw it at my friend to have a look at. With the force of me throwing it the pink stuff started moving down the test which then became 1 line. Don’t think I trust it as it was invalid until I threw it 🤷🏼‍♀️ I literally have no signs of me coming on my period .. shall I take a test this morning?