Could I be pregnant?

I'm a bit confused and need some advise/opinions. Yesterday after using the restroom I wiped and I had some discharge that I've never had before. It was a clear mucus like discharge mixed with some blood. It happened twice after urinating. But today I just have very light pink spotting. I took a test but it was negative. Could there still be a possibility of me being pregnant?

My husband and I haven't been trying, but we haven't necessarily tried to prevent getting pregnant either. My fertile window was Jan 24 -29, and we had sex on Jan 24.

Please leave your suggestions!