Pregnant 5 months after birth

Hey guys, I’m new here. I just had my daughter 5 months ago vaginally & I think I might be pregnant again. It’s like I’m scared but I’m also feeling like sad because I’m pregnant so soon but then I’m hoping that everything’s good & okay. I recently had my period on the 16th of January & I had sex on the last day of my period, I’ve also had it about 2 days ago & we did it multiple times. But also a couple of days ago I started spotting. Not a lot of blood but it’s pink & i can see it when I wipe. It’s on & off but it hasn’t gotten too strong & I haven’t been cramping. Just uncomfortable feeling in my lower belly sometimes. I took a pregnancy test & it says negative. But I’m not sure. Any woman been in the same predicament? If so I need some advice.