Should I take another pregnancy test?

I had unprotected Jan. 3 and then had some brown discharge for about a week off and on, and my cycle is 4 days late this month. I took two pregnancy tests last month because I was having hot flashes and just feeling funky and they were both negative, I’m wondering if I tested too soon or if I’m imagining the symptoms 😂 I don’t want to keep buying tests if it’s all in my head. I didn’t find out I was pregnant with my daughter until I started having morning sickness around 6-7 weeks because I kept testing negative, so wondering if that could be the case again 🧐