Test negative but not sure what to think

Alyssa

So I have a baby girl she will be 8 months at the end of the month. I am currently sexually active. So wen I first got pregnant with my daughter my cat used to come around a lot like sleeping with me. So I missed my period,I’m 3 days late and have noticed the last few weeks my cat keeps trying to sleep on my bed with me. My boyfriend/baby daddy is constantly working so I’m always just sleeping with the baby since he does overnights. But I don’t know what I should do. I took a test but it’s negative. Not sure what to think or make of it or am I just over thinking. Any thoughts on what I should do or what you all think?