need advice please ! 😩

okay, so I was supposed to start my period Monday May 22 which makes me a week late. I had pink/brown spotting from Tuesday-Thursday so I thought it was my period starting but then the spotting stopped. I've been taking pregnancy tests and they've all been negative. Two days ago I took an ovulation test to see what it would look like, it was a really light line, negative of course. then today I took another one and it's almost positive ! but I had a positive ovulation test on May 8th, how is this possible? especially since I didn't have a period this month. I'm so confused ! any advice would be appreciated !