Opinions?

I took a trigger shot on the 14th. I know that they can register false positive pregnancy tests. At 7dpo i had a lot of implantation symptoms. I decided to test because why not. It was negative. 9dpo I started to feel a little nauseous off and on so I tested again and got a really light positive. I tested again today 10 DPO and it’s negative. Any ideas why I would get a random positive after getting a negative and getting a negative today? Tests below 7dpo is on top 9dpo middle and 10 DPO bottom.