Early pregnancy signs or just overthinking?

Last possible date of conception was Jan 29th, had a period 4 days later. But now this period is a week late. I had some slight spotting last week. I’m seeing an increase in normal discharge. I took an old pregnancy test (set to expire in 3 months) and it came out negative. Maybe a false negative because of how old it is?

Someone please help because I have no idea what to do.